Document:

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                                                                     EXHIBIT 4.3

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                         QUANTUM HEALTH RESOURCES, INC.

                                       AND

                        FIRST TRUST NATIONAL ASSOCIATION,
                                     Trustee

                            -------------------------

                             Supplemental Indenture

                            Dated as of June 28, 1996

                            -------------------------

                                       To

                     Indenture, Dated as of October 8, 1993,
                   Between Quantum Health Resources, Inc. and
                  First Trust National Association, as Trustee,
               Relating to $86,250,000 Aggregate Principal Amount
        of 4 3/4% Convertible Subordinated Debentures Due October 1, 2000

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                             SUPPLEMENTAL INDENTURE

                  SUPPLEMENTAL INDENTURE (this "Supplemental Indenture"), dated
as of June 28, 1996, between Quantum Health Resources, Inc., a Delaware
corporation (the "Company"), having its principal office at Two Parkwood
Crossing, Suite 500, 310 East 96th Street, Suite 500, Indianapolis, Indiana,
46240, and First Trust National Association, a Minnesota corporation, as Trustee
(the "Trustee").

                             RECITALS OF THE COMPANY

                  WHEREAS the Company and the Trustee heretofore executed and
delivered an Indenture, dated as of October 8, 1993 (the "Indenture")
(capitalized terms used but not otherwise defined in this Supplemental Indenture
shall have the meanings ascribed to such terms in the Indenture); and

                  WHEREAS, pursuant to the Indenture, the Company issued and the
Trustee authenticated and delivered $86,250,000 aggregate principal amount of
the Company's 4 3/4% Convertible Subordinated Debentures Due October 1, 2000
(the "Debentures"); and

                  WHEREAS, pursuant to the Amended and Restated Agreement and
Plan of Merger (the "Merger Agreement"), dated as of May 1, 1996, by and among
Olsten Corporation, a Delaware corporation ("Olsten"), QHR Acquisition Corp., a
Delaware corporation that is a wholly owned subsidiary of Olsten ("Merger Sub"),
and the Company, on June 28, 1996, Merger Sub was merged with and into the
Company (the "Merger), with the Company as the surviving corporation, and each
issued and outstanding share of the Company's Common Stock, par value $.01 per
share ("Quantum Common Stock"), other than such Quantum Common Stock held by
stockholders exercising dissenter's rights under the General Corporation Law of
the State of Delaware, was converted into the right to receive fifty-eight one
hundredths (.58) of one share (the "Conversion Number") of Olsten's Class B
Common Stock, par value $.10 per share ("Class B Stock"); and

                  WHEREAS Section 13.11 of the Indenture provides that, in the
case of any merger of another Person into the Company which results in the
conversion of Quantum Common Stock, the Person resulting from such merger shall
execute and deliver to the Trustee a supplemental indenture providing that the
Holder of each Debenture then outstanding shall have the right thereafter,
during the period such Debenture shall be Convertible as specified in Section
13.1 of the Indenture, to convert such Debenture only into the kind and amount
of securities, cash or other assets receivable upon such merger by a holder of
the number of

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                                      -2-

shares of Quantum Common Stock into which such Debenture might have been
converted immediately prior to such merger; and

                  WHEREAS, this Supplemental Indenture has been duly authorized
by all necessary corporate action on the part of the Company; and

                  WHEREAS the Company has delivered, or caused to be delivered,
to the Trustee, an Opinion of Counsel and Officers' Certificate, each stating
that this Supplemental Indenture complies with the requirements of the
Indenture.

                  NOW, THEREFORE, the Company hereby covenants and agrees with
the Trustee for the equal and proportionate benefit of all Holders of the
Debentures, as follows:

                  SECTION 1. Amendment of Certain Sections of' Indenture.
Subject to the other provisions hereof, the Indenture is hereby amended and
supplemented in the following respects:

                  (a) Section 13.4 of the Indenture is hereby amended and
         supplemented by adding the following at the end thereof:

                  "(j) From and after the effective time of the merger of QHR
         Acquisition Corp., a Delaware corporation ("Merger Sub"), with and into
         the Company pursuant to the Amended and Restated Agreement and Plan of
         Merger (the "Merger Agreement"), dated as of May 1, 1996, by and among
         Olsten Corporation, a Delaware corporation ("Olsten"), Merger Sub and
         the Company, which merger occurred on June 28, 1996, the Holder of each
         Debenture then outstanding shall have the right thereafter, during the
         period such Debenture shall be convertible as specified in Section
         13.1, to convert each such Debenture only into the number of shares of
         Olsten Class B Common Stock, par value $.10 per share, obtained by
         multiplying fifty-eight one hundredths (.58) by the number of shares of
         Common Stock of the Company into which such Debenture might have been
         converted immediately prior to such merger, assuming such holder of
         Common Stock of the Company is not a Constituent Person or an Affiliate
         of a Constituent Person, subject to such further adjustments as may be
         required by the provisions of this Indenture;" and

                  SECTION 2. Effect of Supplemental Indenture. Upon the
execution and delivery of this Supplemental Indenture by the Company and the
Trustee, the Indenture shall be supplemented in accordance herewith, and this
Supplemental Indenture shall form a part of

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                                      -3-

the Indenture for all purposes, and every Holder of Securities heretofore or
hereafter authenticated and delivered under the Indenture shall be bound
thereby.

                  SECTION 3. Indenture Remains in Full Force and Effect. Except
as supplemented hereby, all provisions in the Indenture shall remain in full
force and effect.

                  SECTION 4. Indenture and Supplemental Indenture Construed
Together. This Supplemental Indenture is an indenture supplemental to the
Indenture, and forms a part of the Indenture for all purposes.

                  SECTION 5. Conflict with Trust Indenture Act. If any provision
of this Supplemental Indenture limits, qualifies or conflicts with any provision
of Sections 310 through 317, inclusive, of the Trust Indenture Act, which
provision imposes duties on any Person, the applicable provisions of Sections
310 through 317, inclusive, of the Trust Indenture Act shall control.

                  SECTION 6. Separability Clause. In case any provision in this
Supplemental Indenture shall be invalid, illegal or unenforceable, the validity,
legality and enforceability of the remaining provisions shall not in any way be
affected or impaired thereby.

                  SECTION 7. Effect of Headings. The Article and Section
headings herein are for convenience only and shall not affect the construction
hereof.

                  SECTION 8. Benefits of Supplemental Indenture, Etc. Nothing in
this Supplemental Indenture, express or implied, shall give to any Person, other
than the parties hereto and thereto and their successors hereunder, any benefit
or any legal or equitable right, remedy or claim under this Supplemental
Indenture.

                  SECTION 9. Successors and Assigns. All covenants and
agreements in this Supplemental Indenture by the Company shall bind its
successors and assigns, whether so expressed or not.

                  SECTION 10. Trustee Not Responsible for Recitals. The recitals
contained herein shall be taken as the statements of the Company, and the
Trustee assumes no responsibility for their correctness. The Trustee makes no
representations as to the validity or sufficiency of this Supplemental
Indenture.

                  SECTION 11. Certain Duties and Responsibilities of the
Trustee. In entering into this Supplemental Indenture, the Trustee shall be
entitled to the benefit of every provision of the Indenture relating to the
conduct or affecting the liability of or affording protection to the Trustee,
whether or not elsewhere herein so provided.

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                  SECTION 12. Governing Law. This Supplemental Indenture shall
be governed by and construed in accordance with the laws of the State of New
York.

                  SECTION 13. Counterparts. This Supplemental Indenture may be
executed in counterparts, each of which, when so executed, shall be deemed to be
an original, but all such counterparts shall together constitute but one and the
same instrument.

                  IN WITNESS WHEREOF, the parties hereto have caused this
Supplemental Indenture to be duly executed and attested, all as of the date and
year first above written.

                                       QUANTUM HEALTH RESOURCES, INC.

                                       By:
                                              ----------------------------------
                                       Title:
                                              ----------------------------------

Attest:

-----------------------------------
Title:
       ----------------------------

                                       FIRST TRUST NATIONAL ASSOCIATION,
                                       as Trustee

                                       By:
                                              ----------------------------------
                                       Title:
                                              ----------------------------------

Attest:

-----------------------------------
Title:
       ----------------------------<PAGE>
                                                                     EXHIBIT 4.4

                  Series A Junior Participating Preferred Stock
                    (Liquidation Preference $1.00 Per Share)

                           CERTIFICATE OF DESIGNATION

                          GENTIVA HEALTH SERVICES, INC.

                          ----------------------------

                Certificate of Designation of Board of Directors
                   Designating a Series of Preferred Stock as
                  Series A Junior Participating Preferred Stock
                           and Fixing Distribution and
                   Other Preferences and Rights of Such Series

                          ----------------------------

                              Dated as of [ ], 2000

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                          GENTIVA HEALTH SERVICES, INC.

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                          Certificate of Designation of
                        Board of Directors Designating a
                          Series of Preferred Stock as
                  Series A Junior Participating Preferred Stock
                           and Fixing Distribution and
                   Other Preferences and Rights of Such Series

                                   ----------

                  GENTIVA HEALTH SERVICES, INC., a Delaware corporation, having
its principal office in the State of New York in the City of New York (the
"Company"), hereby certifies that:

                  Pursuant to authority conferred upon the Board of Directors by
the Restated Certificate of Incorporation ("Charter") and Bylaws of the Company,
the Board of Directors pursuant to resolutions adopted on [ ], 2000 (i)
authorized the creation and issuance of up to [ ] shares of Series A Junior
Participating Preferred Stock which stock was previously authorized but not
issued and (ii) determined the voting powers, designations, preferences and
relative, participating, optional or other special rights, qualifications,
limitations or restrictions, and terms and conditions of redemption of the
shares of such series and the dividend rate payable on such series. Such voting
powers, designations, preferences and relative, participating, optional or other
special rights, qualifications, limitations or restrictions, and terms and
conditions of redemption, number of shares and dividend rate are as follows:

                  Section 1. NUMBER OF SHARES AND DESIGNATION. This series of
Preferred Stock shall be designated the Series A Junior Participating Preferred
Stock (the "Series A Preferred Shares") and the number of shares which shall
constitute such series shall be [ ] shares, par value $0.01 per share. Such
number of shares may be increased or decreased by resolution of the Board of
Directors; provided, that no decrease shall reduce the number of Series A
Preferred Shares to a number less than the number of shares then outstanding
plus the number of shares reserved for issuance upon the exercise of outstanding
options, rights or warrants or upon the conversion

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of any outstanding securities issued by the Company convertible into Series A
Preferred Shares.

                  Section 2. DIVIDEND RIGHTS. (1) Subject to the rights of
holders of any shares of any series of Preferred Stock (or any similar stock)
ranking prior and superior to the Series A Preferred Shares with respect to
dividends, the holders of Series A Preferred Shares shall be entitled prior to
the payment of any dividends on shares ranking junior to the Series A Preferred
Shares to receive, when, as and if declared by the Board of Directors out of
funds legally available for the purpose, quarterly dividends payable in cash on
the first day of [March, June, September and December] in each year (each such
date being referred to herein as a "Quarterly Dividend Payment Date"),
commencing on the first Quarterly Dividend Payment Date after the first issuance
of a share or fraction of a share of Series A Preferred Shares, in an amount per
share (rounded to the nearest cent) equal to the greater of (a) $1.00 or (b)
subject to the provision for adjustment hereinafter set forth, 1,000 times the
aggregate per share amount of all cash dividends, and 1,000 times the aggregate
per share amount (payable in kind) of all non-cash dividends or other
distributions (other than a dividend payable in shares of common stock, par
value $0.10 per share, of the Company (the "Common Stock") or a subdivision of
the outstanding shares of Common Stock (by reclassification or otherwise))
declared on the Common Stock since the immediately preceding Quarterly Dividend
Payment Date, or, with respect to the first Quarterly Dividend Payment Date,
since the first issuance of any share or fraction of a share of Series A
Preferred Shares. In the event the Company shall at any time (i) declare or pay
any dividend on Common Stock payable in shares of Common Stock, (ii) subdivide
the outstanding Common Stock, or (iii) combine the outstanding Common Stock into
a smaller number of shares, then in each such case the amount to which holders
of Series A Preferred Shares were entitled immediately prior to such event under
clause (b) of the preceding sentence shall be adjusted by multiplying such
amount, which initially shall be 1,000, by a fraction, the numerator of which is
the number of shares of Common Stock outstanding immediately after such event
and the denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event (such number, as so adjusted from
time to time pursuant to the terms hereof, the "Adjustment Number").

                  (2) The Company shall declare a dividend or distribution on
the Series A Preferred Shares as provided in subparagraph (1) above immediately
after it declares a dividend or distribution on the Common Stock (other than a
dividend payable in shares of Common Stock); provided that, in the event no
dividend or distribution shall have been declared on the Common

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Stock during the period between any Quarterly Dividend Payment Date and the next
subsequent Quarterly Dividend Payment Date, a dividend of $1.00 per share on the
Series A Preferred Shares shall nevertheless be payable on such subsequent
Quarterly Dividend Payment Date.

                  (3) Dividends shall begin to accrue and be cumulative on
outstanding Series A Preferred Shares from the Quarterly Dividend Payment Date
next preceding the date of issue of such Series A Preferred Shares, unless the
date of issue of such shares is prior to the record date for the first Quarterly
Dividend Payment Date, in which case dividends on such shares shall begin to
accrue from the date of issue of such shares, or unless the date of issue is a
Quarterly Dividend Payment Date or is a date after the record date for the
determination of holders of Series A Preferred Shares entitled to receive a
quarterly dividend and before such Quarterly Dividend Payment Date, in either of
which events such dividends shall begin to accrue and be cumulative from such
Quarterly Dividend Payment Date. Accrued but unpaid dividends shall not bear
interest. Dividends paid on the Series A Preferred Shares in an amount less than
the total amount of such dividends at the time accrued and payable on such
shares shall be allocated pro rata on a share-by-share basis among all such
shares at the time outstanding. The Board of Directors may fix a record date for
the determination of holders of Series A Preferred Shares entitled to receive
payment of a dividend or distribution declared thereon, which record date shall
be no more than 30 days prior to the date fixed for the payment thereof.

                  Section 3. LIQUIDATION. (1) Upon any liquidation, dissolution
or winding up of the Company, no distribution shall be made to the holders of
shares of stock ranking junior (either as to dividends or upon liquidation,
dissolution or winding up) to the Series A Preferred Shares unless, prior
thereto, the holders of Series A Preferred Shares shall have received an amount
per share (the "Series A Liquidation Preference") equal to the greater of (i)
$1.00 plus an amount equal to accrued and unpaid dividends and distributions
thereon, whether or not declared, to the date of such payment, or (ii) the
Adjustment Number times the per share amount of all cash and other property to
be distributed in respect of the Common Stock upon such liquidation, dissolution
or winding up of the Company.

                  (2) In the event, however, that there are not sufficient
assets available to permit payment in full of the Series A Liquidation
Preference and the liquidation preferences of all other series of Preferred
Stock, if any, which rank on a parity with the Series A Preferred Shares, then
such remaining assets shall be distributed ratably to the holders of such parity

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shares in proportion to their respective liquidation preferences. In the event,
however, that there are not sufficient assets available to permit payment in
full of the Common Adjustment, then such remaining assets shall be distributed
ratably to the holders of Common Stock.

                  (3) In the event the Company shall at any time (i) declare any
dividend on Common Stock payable in shares of Common Stock, (ii) subdivide the
outstanding Common Stock, or (iii) combine the outstanding Common Stock into a
smaller number of shares, then in each such case the Adjustment Number in effect
immediately prior to such event shall be adjusted by multiplying such Adjustment
Number by a fraction, the numerator of which is the number of shares of Common
Stock outstanding immediately after such event and the denominator of which is
the number of shares of Common Stock that were outstanding immediately prior to
such event.

                  (4) Neither the merger or consolidation of the Company into or
with another corporation nor the merger or consolidation of any other
corporation into or with the Company shall be deemed to be a liquidation,
dissolution or winding up of the Company within the meaning of this Section 3.

                  Section 4. NO REDEMPTION. The Series A Preferred Shares shall
not be redeemable.

                  Section 5. VOTING RIGHTS. The holders of Series A Preferred
Shares shall have the following voting rights:

                  (1) Subject to the provision for adjustment hereinafter set
         forth, each Series A Preferred Share shall entitle the holder thereof
         to 1,000 votes on all matters voted on at a meeting of the stockholders
         of the Company. In the event the Company shall at any time (i) declare
         or pay any dividend on Common Stock payable in shares of Common Stock,
         or (ii) subdivide the outstanding Common Stock, or (iii) combine the
         outstanding Common Stock into a smaller number of shares, then in each
         such case the number of votes per share to which holders of Series A
         Preferred Shares were entitled immediately prior to such event shall be
         adjusted by multiplying such number by a fraction, the numerator of
         which is the number of shares of Common Stock outstanding immediately
         after such event and the denominator of which is the number of shares
         of Common Stock that were outstanding immediately prior to such event.

                  (2) Except as otherwise provided herein or by law, the holders
         of Series A Preferred Shares and the holders of shares of Common Stock
         and any other capital stock of the Company having general voting rights
         shall vote to-

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         gether as one voting group on all matters submitted to a vote of
         stockholders of the Company.

                  (3) Except as set forth herein or as otherwise provided by
         law, holders of Series A Preferred Shares shall have no special voting
         rights and their consent shall not be required (except to the extent
         they are entitled to vote with holders of Common Stock as set forth
         herein) for taking any corporate action.

                  Section 6. CERTAIN RESTRICTIONS. (1) Whenever quarterly
dividends or other dividends or distributions payable on the Series A Preferred
Stock as provided in Section 2 are in arrears, thereafter and until all accrued
and unpaid dividends and distributions, whether or not declared, on Series A
Preferred Shares outstanding shall have been paid in full, the Company shall
not:

                   (i) declare or pay dividends on, make any other distributions
         on, or redeem or purchase or otherwise acquire for consideration any
         shares of stock ranking junior (either as to dividends or upon
         liquidation, dissolution or winding up) to the Series A Preferred
         Shares;

                  (ii) declare or pay dividends on or make any other
         distributions on any shares of stock ranking on a parity (either as to
         dividends or upon liquidation, dissolution or winding up) with the
         Series A Preferred Shares, except dividends paid ratably on the Series
         A Preferred Shares and all such parity stock on which dividends are
         payable or in arrears in proportion to the total amounts to which the
         holders of all such shares are then entitled;

                 (iii) redeem or purchase or otherwise acquire for consideration
         shares of any stock ranking on a parity (either as to dividends or upon
         liquidation, dissolution or winding up) with the Series A Preferred
         Shares, provided that the Company may at any time redeem, purchase or
         otherwise acquire shares of any such parity stock in exchange for
         shares of any stock of the Company ranking junior (either as to
         dividends or upon dissolution, liquidation or winding up) to the Series
         A Preferred Shares; or

                  (iv) purchase or otherwise acquire for consideration any
         shares of Series A Preferred Shares or any shares of stock ranking on a
         parity with the Series A Preferred Shares, except in accordance with a
         purchase offer made in writing or by publication (as determined by the
         Board of Directors) to all holders of such shares upon such terms as
         the Board of Directors, after consideration of the respective annual
         dividend rates and other relative rights

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         and preferences of the respective series and classes, shall determine
         in good faith will result in fair and equitable treatment among the
         respective series or classes.

                  (2) The Company shall not permit any subsidiary of the Company
to purchase or otherwise acquire for consideration any shares of stock of the
Company unless the Company could, under subparagraph (1) of this Section 6,
purchase or otherwise acquire such shares at such time and in such manner.

                  Section 7. REACQUIRED SHARES. Any Series A Preferred Shares
purchased or otherwise acquired by the Company in any manner whatsoever shall be
retired and cancelled promptly after the acquisition thereof. All such shares
shall upon their cancellation become authorized but unissued shares of Preferred
Stock and may be reissued as part of a new series of Preferred Stock to be
created by resolution or resolutions of the Board of Directors, subject to the
conditions and restrictions on issuance set forth herein or in the Charter.

                  Section 8. MERGER, CONSOLIDATION, ETC. In case the Company
shall enter into any merger, consolidation, combination or other transaction in
which the shares of Common Stock are exchanged for or changed into other stock
or securities, cash and/or any other property, then in any such case each Series
A Preferred Share shall at the same time be similarly exchanged or changed into
an amount per share (subject to the provision for adjustment hereinafter set
forth) equal to 1,000 times the aggregate amount of stock, securities, cash
and/or any other property (payable in kind), as the case may be, into which or
for which each share of Common Stock is changed or exchanged. In the event the
Company shall at any time (i) declare any dividend on Common Stock payable in
shares of Common Stock, (ii) subdivide the outstanding Common Stock, or (iii)
combine the outstanding Common Stock into a smaller number of shares, then in
each such case the amount set forth in the preceding sentence with respect to
the exchange or change of Series A Preferred Shares shall be adjusted by
multiplying such amount by a fraction, the numerator of which is the number of
shares of Common Stock outstanding immediately after such event and the
denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

                  Section 9. RANKING. The Series A Preferred Shares shall rank,
with respect to the payment of dividends and distribution of assets, junior to
all other series of the Company's Preferred Stock unless the terms of any such
series shall provide otherwise.

                  Section 10. AMENDMENT. The Charter, including this Certificate
of Designation establishing the rights and prefer-

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ences of the Series A Preferred Shares, shall not be amended in any manner which
would materially alter or change the powers, preferences or special rights of
the Series A Preferred Shares so as to affect them adversely without the
affirmative vote of the holders of a majority of the outstanding Series A
Preferred Shares, voting separately as one voting group, or such greater
percentage as required by law or by the principal national securities exchange
on which the Series A Preferred Shares may be listed or admitted to trading, or
NASDAQ.

                  Section 11. FRACTIONAL SHARES. Series A Preferred Shares may
be issued in fractions of a share which shall entitle the holder, in proportion
to such holder's fractional shares, to exercise voting rights, receive
dividends, participate in distributions and to have the benefit of all other
rights of holders of Series A Preferred Shares.

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                  IN WITNESS WHEREOF, the Company has caused this Certificate of
Designation to be signed in its name and on its behalf and attested to by the
undersigned on this [ ] day of [ ], 2000 and the undersigned acknowledges under
the penalties of perjury that this Certificate of Designation is the corporate
act of said Company and that to the best of his knowledge, information and
belief, the matters and facts set forth herein are true in all material
respects.

                                     GENTIVA HEALTH SERVICES, INC.

                                     By:
                                         ---------------------------------------
                                         Name:
                                         Title:

Attest:

--------------------------------
Name:
Title:

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