1. Paediatric Ophthalmology and Strabismus Unit, Department of Ophthalmology, University of Calabar, Calabar, Cross River State, Nigeria
2. Department of Ophthalmology, Marion Eye Centre, Marion, Illinois, USA
3. Department of Ophthalmology, University of Calabar, Calabar, Cross River State, Nigeria
4. Department of Pediatrics, All Saints University of Medicine, Common Wealth of Dominica, Rivers State, Nigeria
5. Department of Ophthalmology, The Ophthalmic Specialists, Port Harcourt, Rivers State, Nigeria
6. Department of Ophthalmology, University of Uyo Teaching Hospital, Uyo, Akwa Ibom State, Nigeria