1. Department of Medicine, Fakeeh College for Medical Sciences, Jeddah, KSA, Saudi Arabia
2. College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Jeddah, KSA, Saudi Arabia
3. College of Medicine, Umm al-Qura University, Mecca, KSA, Saudi Arabia
4. Department of Medicine, ibn Sina National College, Jeddah, KSA, Saudi Arabia