1. Obesity, Endocrine and Metabolism Center, King Fahad Medical City, Riyadh, Saudi Arabia
2. Department of Medicine, Endocrinology and Diabetes Unit, College of Medicine and King Saud University Medical City, King Saud University, Riyadh, Saudi Arabia
3. Division of Neurosurgery, Department of Surgery, Tawam Hospital, United Arab Emirates
4. Department of Medicine, Tawam Hospital, Al Ain, United Arab Emirates
5. Department of Medicine, UAE University, United Arab Emirates