1. From the Department of Radiation Oncology, Fox Chase Cancer Center (EMH, GEH), Philadelphia, Pennsylvania, Department of Biomathematics (HDT, LBL) and Division of Radiation Oncology (DAK), University of Texas M. D. Anderson Cancer Center, Houston, Texas, Department of Radiation Oncology, Cleveland Clinic Foundation (PAK), Cleveland, Ohio, and William Beaumont Hospital (AAM), Royal Oak and University of Michigan (HMS), Ann Arbor, Michigan, Department of Radiation Oncology, Mallinckrodt Institute of...