1. Department of Radiation Oncology, University of Miami Miller School of Medicine/Sylvester Comprehensive Cancer Center and Jackson Memorial Hospital, Miami, FL
2. MercyOne Waterloo Medical Center, Waterloo, IA
3. Department of Radiation Oncology, Augusta University, Augusta, GA
4. Southern Illinois Healthcare Cancer Institute, Carterville, IL
5. Department of Radiation Oncology, University of Tennessee, Knoxville, TN
6. Department of Dermatology and Department of Therapeutic Radiology, Yale School of Medicine, New Haven, CT
7. Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
8. Department of Radiation Medicine, Oregon Health & Science University, Portland, OR
9. Department of Medicine, WellMD Center, Stanford School of Medicine, Stanford University, Palo Alto, CA
10. Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, Baltimore, MD
11. Department of Radiation Oncology, University of Michigan, Ann Arbor, MI
12. Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX