1. From the Wilshire Oncology Medical Group, Inc, Pasadena, CA; Southwest Oncology Group Statistical Center, Seattle, WA; University of Arizona Cancer Center, Tucson, AZ; Loyola University Stritch School of Medicine, Maywood, IL; Henry Ford Hospital, Detroit, MI; Columbus Community Clinical Oncology Program, Columbus, OH; University of Kansas Medical Center, Kansas City, MO; University of Colorado School of Medicine, Denver, CO; and University of Rochester School of Medicine, Rochester, NY.