1. Oculoplastic Division, King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia
2. Ophthalmology Department, College of Medicine, King Saud University
3. Opthalmology Department, Hospital Nuestra Senora de Fatima, Vigo, Spain
4. Neuro-Ophthalmology, Otorhinolaryngology and Head and Neck Surgery, School of Medicine of Ribeirao Preto, University of Sao Paulo, Sao Paulo, Brazil
5. NuroOpthalmology Division, King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia