1. Department of Surgery, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
2. Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts
3. Health Services Research Unit, Hospital del Mar Research Institute, Barcelona, Spain
4. CIBER Epidemiología y Salud Pública, Barcelona, Spain
5. Universitat Autònoma de Barcelona, Barcelona, Spain
6. Department of Radiation Oncology, Institut Català d’Oncologia, L’Hospitalet de Llobregat, Barcelona, Spain
7. Department of Urology, Emory University School of Medicine, Atlanta, Georgia
8. Department of Urology, University of Michigan, Ann Arbor, Michigan
9. Office for Survey Research, Institute for Public Policy and Social Research, Michigan State University, East Lansing, Michigan
10. Department of Radiation Oncology, Washington University, St. Louis, Missouri
11. Department of Urology, UCLA Center for Health Sciences, Los Angeles, California
12. Department of Health Policy and Management, UCLA Center for Health Sciences, Los Angeles, California
13. Texas Center for Proton Therapy, Irving, Texas
14. Department of Radiation Oncology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
15. Department of Radiation Oncology, Cleveland Clinic, Cleveland, Ohio
16. Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio
17. Division of Urology, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts
18. Department of Radiation Oncology, Cedars-Sinai Medical Center, Los Angeles, California