1. Department of Ophthalmology, College of Medicine, King Saud University, Riyadh, Saudi Arabia
2. King Saud University Medical City, King Saud University, Riyadh, Saudi Arabia
3. College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
4. Department of Pathology, College of Medicine, King Saud University, Riyadh, Saudi Arabia