Exhibit 10.1 [AHP Letterhead] April 19, 2001 Ms. Peggy Phillips Chief Operating Officer Immunex Corporation 51 University Street Seattle, WA 98101 Re: Amendment No. 1 to Memorandum of Understanding -----------------------------------------------...Immunex Corp /De/ • May 11th, 2001 • Biological products, (no disgnostic substances)
Company FiledMay 11th, 2001 Industry