1. Instituto Nacional de Salud del Nino; Lima Peru
2. Department of Ophthalmology; Haukeland University Hospital; Bergen Norway
3. Department of Clinical Medicine; University of Bergen; Bergen Norway
4. Department of Dermatology; Haukeland University Hospital; Bergen Norway
5. Center for Medical Genetics and Molecular Medicine; Haukeland University Hospital; Bergen Norway
6. Department of Pediatrics; Emma Children's Hospital and Department of Clinical Genetics, Academic Medical Center, University of Amsterdam; Amsterdam Netherlands