1. College of Medicine, King Saud Bin Abdulaziz University for Health Sciences , Jeddah 22384 , Saudi Arabia
2. Department of Medicine, King Abdullah International Medical Research Center , Jeddah 22384 , Saudi Arabia
3. Department of Internal Medicine, Division of Endocrinology, King Abdulaziz Medical City, Ministry of the National Guard-Health Affairs , Jeddah 22384 , Saudi Arabia
4. Department of Internal Medicine, King Faisal Specialists Hospital and Research Center , Jeddah 22384 , Saudi Arabia
5. Department of Family Medicine, Ministry of National Guard-Health Affairs, King Abdulaziz Medical City , Jeddah 22384 , Saudi Arabia