Exhibit 10.6**EXHIBIT D**GUARANTY          In consideration of                                                              (“Lessor”) enteringinto the foregoing Lease (the “Lease”) with Aurora Medical Group, Inc. (the “Lessee”), and othergood and valuable consideration, the receipt and sufficiency of which are acknowledged, theundersigned, Aurora Health Care, Inc. (herein called “Guarantor”) guarantees the full and punctualpayment of rent to be paid by Lessee under the Lease and the performance by Lessee of all of theterms and conditions thereof, and agree:          (1) That if Lessee shall default under the Lease beyond any grace or cure period, Guarantorwill, on demand, pay to Lessor any payment that may be due to Lessor by reason of such default,together with all damages that may arise in consequence thereof that may be incurred by Lessor inenforcing Lessee’s covenants and agreements herein;          (2) That, at Lessor’s option, Guarantor may be joined in any action or proceeding commenced byLessor against Lessee in connection with or based upon the Lease or any provision thereof, and thatrecovery may be had against Guarantor in any such action or proceeding or in any independent actionor proceeding against Guarantor;          (3) That, in the event of any bankruptcy, reorganization, winding-up or similar proceedingswith respect to Lessee, no limitation on Lessee’s liability under the Lease which may now orhereafter be imposed by any federal, state or other statute, law, regulation or judicial oradministrative determination applicable to such proceedings shall in any way limit Guarantor’sobligation hereunder, which obligation is co-extensive with Lessee’s liability as set forth in theLease without regard to any such limitation;          (4) That this Guaranty shall remain in full force and effect as to any renewal, extension,modification or amendment of the Lease and as to any assignee of Lessee’s interest under the Lease;          (5) That the validity of this Guaranty and the obligations of Guarantor hereunder shall not inany way be terminated, affected or impaired by reason of any action which Lessor might take or beforced to take against Lessee, or by reason of any waiver of or failure to enforce any of therights or remedies reserved to Lessor in the Lease, or otherwise, or by reason of any extension oftime or other forbearance granted to Lessee by Lessor;          (6) That Guarantor hereby waives notice of any and all notices or demands which may be givenby Lessor to Lessee, whether or not required to be given under the Lease and hereby waive anynotice of acceptance of this Guaranty by Lessor; and          (7) This Guaranty (a) shall be governed by and construed in accordance with the laws of theState of Wisconsin, (b)may be executed in several counterparts, each of which shall be consideredan original but all of which shall constitute but one and the same instrument, and (c) shall bebinding upon and inure to the benefit of the Guarantor and Lessor and their respective heirs,executors,
 

 
administrators, successors and assigns. The venue for any action related to this Guarantyshall be in the Wisconsin Circuit Court for Milwaukee County. There shall be no trial by jury withrespect to any action involving this Guaranty.          IN WITNESS WHEREOF, Guarantor has executed this Guaranty under seal this                      day of                                        , 2007.      **AURORA HEALTH CARE, INC.**