Augusta, Ga: Sridhar Gowda, MD; Sukdeb Mukherjee, MD (deceased); Beth Williams. New York, NY: Erica Duncan, MD; Gita Vaid, MD; Marion Schwartz. Northport, NY: Robert Hitzemann, PhD; Ede Frecska, MD; Paul Manicone. Philadelphia, Pa: Stanley Caroff, MD; E. Cabrina Campbell, MD; Joan Havey. Portland, Ore: Daniel Casey, MD; William Hoffman, MD, and Thomas Hansen, MD; Todd Brundage and Michael Hixs (deceased); Michelle Hanna. San Diego, Calif: James Lohr, MD; no physician participating investigator; John Browning, Michelle Alder, and Beth Curran. Tucson, Ariz: Philip Kanof, MD; no physician participating investigator; Robin Fain. West Haven, Conn: John Krystal, MD; D. Cyril D'Souza, MD; Donna Damon and Leslie Zimmerman. West Los Angeles/Brentwood, Calif: Steven Marder, MD; Donna Ames, MD; Doreen Ross, Julie Doorack, and James Dupree.