1. From the Division of Hematology, Department of Medicine, University of Texas Health Science Center at San Antonio; South Texas Veterans Health Care System, Audie L. Murphy Division; both of San Antonio, TX; Hematology Division, Mayo Clinic, Rochester, MN; Clinical Research Division, Fred Hutchinson Cancer Research Center; University of Washington School of Medicine; Seattle Veterans Administration Hospital; both of Seattle, WA; and Hospital St Louis, Paris, France.