1. Division of Pediatric Ophthalmology, King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia
2. Department and Division of Ophthalmology, College of Medicine, Qassim University, P.O. Box 4490, Buraidah, Qassim 51491, Saudi Arabia
3. Vitreoretinal Division, King Khaled Eye Specialist Hospital, P.O. Box 7191, Riyadh 11462, Saudi Arabia
4. Department of Ophthalmology, King Abdulaziz University Hospital, Old Airport Road, P.O. Box 245, Riyadh 11411, Saudi Arabia
5. Dr. Nasser Al-Rashid Research Chair in Ophthalmology, Riyadh, Saudi Arabia