1. Instituto Dr. Gama Pinto, Lisbon, Portugal
2. Institute of Molecular and Clinical Ophthalmology Basel (IOB), Basel, Switzerland
3. Department of Ophthalmology, University of Basel, Basel, Switzerland
4. Serviço de Genética Médica, Departamento de Pediatria, Hospital Santa Maria/CHULN, Lisbon, Portugal
5. Department of Genetics and Genome Biology, University of Leicester, Leicester, UK