1 Department of Radiation Oncology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada.
2 Radiation Medicine Program, Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada.
3 Mount Vernon Cancer Centre, Northwood, United Kingdom; Division of Cancer Sciences, University of Manchester, United Kingdom.
4 Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, WI, USA.
5 Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Boston, MA, USA.
6 Department of Radiation Oncology, University Hospital Leuven, Herestraat 49, B3000 Leuven, Belgium.
7 Department of Radiotherapy, Leiden University Medical Centre, Leiden, the Netherlands; Netherlands Comprehensive Cancer Organisation, Utrecht, the Netherlands.
8 Department of Radiation Oncology, University Medical Center Utrecht, Utrecht, the Netherlands.
9 Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
10 Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
11 Department of Health Outcomes and Behavior, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA; Department of Radiation Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA.
12 Eastern Woods Radiation Oncology, Blanchard Valley Health Organization, Findlay, OH, USA.
13 Department of Radiation Oncology, University Hospital Zurich, University of Zurich, Rämistrasse 100, 8091 Zurich, Switzerland.
14 Radiotherapy Department II, Greater Poland Cancer Centre, Poznan, Poland.
15 Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland.
16 Radiation Medicine Program, Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada. Electronic address: Srinivas.Raman@rmp.uhn.ca.