1. King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
2. King Abdullah International Medical Research Center (KAIMRC), Riyadh, Saudi Arabia
3. Al-Maarefa College for Science and Technology, Riyadh, Saudi Arabia
4. General Surgery Department, King Abdulaziz Medical City, Riyadh, Saudi Arabia
5. Dar Al Uloom University, Riyadh, Saudi Arabia