1. From the Divisions of Hematology and Nuclear Medicine, Department of Internal Medicine, Mayo Clinic and Mayo Foundation, Rochester, MN; IDEC Pharmaceuticals Corporation, San Diego, CA; Division of Hematology/Oncology, Department of Medicine, and Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL; University of California—Los Angeles, Los Angeles, CA; City of Hope, Duarte, CA; Henry Ford Hospital, Detroit, MI; Sidney Kimmel Cancer Center, San Diego, CA; and Fox Chase Cancer...