1. Department of Radiation Oncology, Miami Cancer Institute, Miami, FL, USA;
2. Florida International University Herbert Wertheim College of Medicine, Miami, FL, USA;
3. Proton Therapy Center, Northwestern University – Chicago, Chicago, IL, USA;
4. ProCure Proton Therapy Center Oklahoma, Oklahoma City, OK, USA;
5. Department of Radiation Oncology, Washington University, St. Louis, MO, USA;
6. Department of Radiation Oncology, University of Washington Medical Center, Seattle, WA, USA;
7. Department of Radiation Oncology, Willis-Knighton Medical Center, Shreveport, LA, USA;
8. ProCure Proton Therapy Center Somerset, Somerset, NJ, USA;
9. Mayo Clinic Arizona, Scottsdale, AZ, USA