1. Obesity, Endocrine and Metabolism Centre, King Fahad Medical City (KFMC), Riyadh, Saudi Arabia.
2. King Fahad Medical City, College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia.
3. King Abdulaziz Medical City, College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia.