1. Department of Radiation Oncology, King Hussein Cancer Center, Amman 11942, Jordan
2. Department of Medical Oncology, King Hussein Cancer Center, Amman 11942, Jordan
3. Department of Biostatistics, King Hussein Cancer Center, Amman 11942, Jordan
4. Department of Surgical Oncology, King Hussein Cancer Center, Amman 11942, Jordan
5. Department of Nuclear Medicine, King Hussein Cancer Center, Amman 11942, Jordan
6. Radiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, ON M5G 2M9, Canada