1. Department of Radiation Oncology, Washington University School of Medicine in St. Louis, St. Louis, Missouri
2. Department of Radiation Oncology, Emory University School of Medicine, Atlanta, Georgia
3. Department of Pathology and Immunology, Washington University School of Medicine in St. Louis, St. Louis, Missouri
4. Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, Missouri
5. Division of Dermatology, Washington University School of Medicine in St. Louis, St. Louis, Missouri
6. Department of Radiation Oncology, University of Pennsylvania, Philadelphia