Exhibit 23.5


                           CONSENT OF LEHMAN BROTHERS


     We hereby consent to the use of our opinion letter dated March 6, 2000
to the Board of Directors of Biomatrix (the "Company") attached as Appendix C
to the Company's Joint Proxy Statement/Prospectus on Form S-4 (the
"Prospectus") and to the references to our firm in the Prospectus under the
headings "Background and Reasons for the Merger" and "Fairness Opinion of
Biomatrix' Financial Advisor." In giving such consent, we do not admit that
we come within the category of persons whose consent is required under
Section 7 of the Securities Act of 1933, as amended, or the rules and
regulations of the Securities and Exchange Commission thereunder and we do
not thereby admit that we are experts with respect to any part of the
Registration Statement under the meaning of the term "expert" as used in the
Securities Act.

                                        LEHMAN BROTHERS INC.



                                    By: /s/ Kevin R. Genirs
                                       -----------------------------------
                                       Senior Vice President

New York, New York
June 30, 2000