1. New York Proton Center, New York, NY 10035, USA
2. Proton Center, Taipei Medical University, Taipei 11031, Taiwan
3. Department of Radiation Oncology, Taipei Medical University, Taipei 11031, Taiwan
4. California Protons Center Therapy Center, San Diego, CA 92121, USA
5. Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
6. Department of Radiation Oncology, Montefiore Medical Center, Bronx, NY 10467, USA
7. Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA