1. 1 From the Departments of Pathology and Cancer Center, University of New Mexico School of Medicine, Albuquerque, NM; the Fred Hutchinson Cancer Research Center and the Department of Medicine, University of Washington and the SWOG Statistical Center, Seattle, WA; the Department of Medicine and Cancer Center, Loyola University School of Medicine, Chicago, IL; the Department of Pathology, City of Hope Cancer Center, Duarte, CA; and the Department of Pathology, St Jude Children's Hospital, Memphis, TN.