definiens: means ( i ) any business or subsidiary thereof which has, as its primary source of revenue, revenue from the Distribution Market including, without limitation, any of McKesson Corporation, Henry Schein, Inc. or Cardinal Health, Inc., or any affiliate, successor or assign of any of the foregoing which entity has, as its primary source of revenue, revenue from the Distribution Market, and ( ii ) Significant Competitors . For purposes of this Section 1.7, the term " Significant Competitors shall mean businesses that ( a ) have a significant source or their revenue derived from the Distribution Market such that PSS reasonably and in good faith determines them to be significant competitors to PSS in the Distribution Market ( regionally or nationally ), and ( b ) are listed on Exhibit F hereto, as amended from time to time . The Parties shall meet within 30 days of the date hereof to agree in good faith upon the initial list for Exhibit F. At any time during the term of this Agreement, PSS may suggest additions to Exhibit F to the extent that additional businesses, in PSS 's good faith judgment, are significant competitors to PSS in the Distribution Market regionally or nationally . Athena shall in good faith consider such suggestion and, within a reasonable period notify PSS of its agreement or disagreement with such suggestion, provided that Athena shall not unreasonably withhold its agreement . Athena shall use commercially reasonable efforts to terminate any existing arrangement with any such business as promptly as practicable . Upon such agreement, and upon the termination of any such existing arrangement, if applicable, the parties will execute an amendment to Exhibit F including the names of the suggested additions