1. Ophthalmology Department, Faculty of Medicine, Alexandria University, Alexandria, Egypt
2. Ophthalmology Department, King’s College Hospital NHS Foundation Trust, London, UK
3. Ophthalmology Department, Russells Hall Hospital, Dudley Group of Hospitals, West Midlands, UK
4. Department of Neonatology, King’s College Hospital NHS Foundation Trust, London, UK
5. Neonatology Department, Faculty of Medicine, Alexandria University, Alexandria, Egypt