1. From the Department of Radiation Oncology, University of North Carolina, Chapel Hill, and Cancer and Leukemia Group B Statistical Office, Duke University Medical Center, Durham, NC; Mayo Clinic Cancer Center, Rochester, MN; Division of Hematology Oncology, Northwestern University, Chicago, IL; Department of Radiation Oncology, Princess Margaret Hospital, Toronto, Ontario, Canada; Radiation Oncology, Mayo Clinic, Scottsdale, AZ; Gastrointestinal Oncology Service, St Vincent’s CCC, New York, NY; and...