1. Hunter Holmes McGuire Veterans Affairs Medical Center, Richmond, Virginia.
2. Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia.
3. James J. Peters Veterans Affairs Medical Center, New York, New York.
4. Icahn School of Medicine at Mount Sinai, New York, New York.
5. Richard L. Roudebush Veterans Affairs Medical Center, Indianapolis, Indiana.
6. Blanchard Valley Regional Health Center, Findlay, Ohio.
7. National Radiation Oncology Program, U.S. Department of Veterans Affairs, Richmond, Virginia.
8. Veterans Affairs New Jersey Healthcare System, East Orange, New Jersey.