1. Department of Radiation Oncology, Advocate Good Samaritan Cancer Center, Downers Grove, Illinois.
2. Radiation Therapy Oncology Group, Philadelphia, Pennsylvania.
3. Department of Nursing, University of Pennsylvania, Philadelphia, Pennsylvania.
4. Rex Healthcare, Raleigh, North Carolina.
5. Department of Radiation Oncology, Newark Beth Israel Medical Center, Newark, New Jersey.
6. Department of Radiation Oncology, University of California, San Francisco, San Francsico, California.
7. Department of Radiation Oncology, Cleveland Clinic, Cleveland, Ohio.
8. Cancer Care Center, Akron City Hospital, Akron, Ohio.
9. Department of Radiation Oncology, Henry Ford Hospital, Detroit, Michigan.
10. Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota.
11. Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania.