1. Division of Medical Oncology, Department of Medicine, The Ottawa Hospital, The University of Ottawa, Ottawa, ON K1N 6N5, Canada
2. Medical Oncology Department, Comprehensive Cancer Center, King Fahad Medical City, Riyadh 11525, Saudi Arabia
3. Kuwait Cancer Control Center, Kuwait City 42262, Kuwait
4. King Abdulaziz Hospital, Ministry of National Guard Health Affairs, Al Ahsa 11426, Saudi Arabia