from SC 13D
1 page
<page> 1 Exhibit 1 Joint Filing Agreement in Accordance With Rule 13d-1(f) Under the Securities Exchange Act of 1934, as Amended, Each of the Persons Named Below Agrees to the Joint Filing of a Statement on Schedule 13d (Including Amendments Thereto) With Respect to the Common Stock, Par Value $.0001 Per Share of Exogen, Inc., a Delaware Corporation, and Further Agrees That This Joint Filing Agreement Be Included as an Exhibit to Such Filings Provided That, as Contemplated by Section 13d-1(f)(1)(ii), No Person Shall Be Responsible for the Completeness or Accuracy of the Information Concerning the Other Persons Making the Filing, Unless Such Person Known or Has Reason to Believe That Such Information Is Inaccurate. This Joint Filing May Be Executed in Any Number of Counterparts, All of Which Together Shall Constitute One and the Same Instrument. Sprout Capital VI, L.P. By: Dlj Capital Corporation Its: Managing General Partner By: /S/Thomas E. Siegler Thomas E. Siegler Secretary and Treasurer Dlj Capital Corporation By: /S/Thomas E. Siegler Thomas E. Siegler Secretary and Treasurer Donaldson, Lufkin & Jenrette, Inc. By: /S/Thomas E. Siegler Thomas E. Siegler Senior Vice President <page> 2 the Equitable Companies Incorporated By: /S/ Alvin H. Fenichel Alvin H. Fenichel Senior Vice President Andcontroller Axa Finaxa Axa Assurances I.A.R.D. Mutuelle Axa Assurances Vie Mutuelle Uni Europe Assurance Mutuelle Alpha Assurances I.A.R.D. Mutuelle Alpha Assurances Vie Mutuelle Claude Bebear, as Axa Voting Trustee Patrice Garnier, as Axa Voting Trustee Henri Clermont-Tonnerre, as Axa Voting Trustee Signed on Behalf of Each of the Above By: /S/Richard V. Silver Richard V. Silver Attorney-In-Fact
