1. From the Walter Reed Army Medical Center, Washington, DC; Cancer and Leukemia Group B Statistical Office, Durham, NC; University of Alabama at Birmingham, Birmingham, AL; Roswell Park Cancer Institute, Buffalo, NY; University of Maryland Cancer Center, Baltimore, MD; Duke University Medical Center, Durham, NC; Dana-Farber Cancer Institute, Boston, MA; State University of New York Health Science Center at Syracuse, Syracuse, NY; and The Ohio State University, Columbus, OH.