1. Temerty Faculty of Medicine, University of Toronto, Toronto, Canada
2. New York Proton Center, Memorial Sloan Kettering Cancer Center, New York, NY, USA
3. Columbia University Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
4. Juravinski Cancer Centre, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Canada
5. London Regional Cancer Program, London Health Sciences Centre, Schulich School of Medicine & Dentistry, University of Western Ontario, London, Canada