1. From The University of Texas M.D. Anderson Cancer Center, Houston, TX; Radiation Therapy Oncology Group Headquarters; Fox Chase Cancer Center Philadelphia, PA; University of Chicago School of Medicine, Chicago, IL; the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, MD; Radiotherapy Associates of Sacramento, Sacramento, CA; University of Alabama, Birmingham, AL; New York University, New York, NY; Akron Hospital, Akron, OH; Medical College of Wisconsin, Milwaukee, WI