1. Radiation Oncology, King Fahad Medical City, Riyadh, Saudi Arabia
2. Radiation Oncology, Comprehensive Cancer Center, King Fahad Medical City, Riyadh 59046, Saudi Arabia
3. Medical Oncology, Comprehensive Cancer Center, King Fahad Medical City, Riyadh 59046, Saudi Arabia
4. Radiation Oncology, King Fahad Medical City, Riyadh 59046, Saudi Arabia
5. Anatomic Pathology, King Fahad Medical City, Riyadh 11525, Saudi Arabia
6. Clinical Oncology, Minia Oncology Center, Minia, Egypt