1. Department A, Hedi Rais Institute of Ophthalmology, Faculty of Medicine, Tunis El Manar University, Tunis, Tunisia
2. Department B, Hedi Rais Institute of Ophthalmology, Faculty of Medicine, Tunis El Manar University, Tunis, Tunisia
3. Department of Ophthalmology, University of Benghazi, Benghazi, Libya
4. Department C, Hedi Rais Institute of Ophthalmology, Faculty of Medicine, Tunis El Manar University, Tunis, Tunisia