EXHIBIT 10.53 February 23, 2004 Gail Sloan 6455 Nancy Ridge Drive San Diego, CA 92121 Re: Severance Agreement Dear Gail, As a supplement to the offer letter and agreement dated March 20, 1996 between La Jolla Pharmaceutical Company ("LJP") and Gail...Severance Agreement • May 7th, 2004 • La Jolla Pharmaceutical Co • Biological products, (no disgnostic substances)
