1. Department of Radiation Oncology, City of Hope National Medical Center, Duarte, CA, USA;
2. Department of Radiation Oncology, Allegheny General Hospital, Pittsburgh, PA, USA;
3. Department of Radiation Oncology, Emory University Hospital, Atlanta, GA, USA;
4. Department of Radiation Oncology, University of Colorado School of Medicine, Aurora, CO, USA;
5. Department of Medical Oncology, City of Hope National Medical Center, Duarte, CA, USA;
6. Department of Radiation Oncology, UC Health – Harmony Campus, Fort Collins, CO, USA