[1] Princess Margaret Hospital,Department of Oncology
[2] Enam Medical College Hospital,Department of Radiation Oncology
[3] Prevention and Clinical Network (ISPO),Cancer Risk Factors and Lifestyle Epidemiology Unit, Institute for Cancer Research
[4] University of Rochester Medical Centre,Departments of Dermatology and Radiation Oncology
[5] Netherlands Comprehensive Cancer Organisation,Department of Dermatology
[6] University Hospitals,Sunnybrook Health Sciences Centre
[7] University of Toronto,Department of Radiation Oncology
[8] Azienda Ospedaliero-Universitaria Careggi,Department of Radiation Oncology
[9] University of Toronto,Michael G. DeGroote School of Medicine
[10] McMaster University,undefined