1. IRO - Institute for Research in Ophthalmology; Sion Switzerland
2. Jules-Gonin Eye Hospital; Fondation Asile des Aveugles; University of Lausanne; Lausanne (UNIL); Switzerland
3. Department of Pediatrics; University of Alexandria; Alexandria Egypt
4. Department of Ophthalmology; University of Alexandria; Alexandria Egypt
5. Faculty of Life Sciences; Ecole polytechnique fédérale de Lausanne (EPFL); Lausanne Switzerland