1. From the North Georgia Radiation Therapy/The Hope Center, Cartersville; Emory University, Atlanta, GA; Dana-Farber Cancer Institute; Eastern Cooperative Oncology Group Coordinating Center; Beth Israel Deaconess Medical Center, Boston, MA; Vanderbilt University, Nashville, TN; University of Pennsylvania, Philadelphia, PA; Johns Hopkins Oncology Center, Baltimore, MD; Baystate Medical Center, Springfield, MA; and Mayo Clinic, Rochester, MN.