1. Department of Ophthalmology, Cantonal Hospital St. Gallen, St. Gallen, Switzerland
2. Department of Ophthalmology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
3. Department of Human Genetics, Department of Pediatrics, Inselspital, Bern University Hospital, Bern, Switzerland
4. Department of Ophthalmology, University Hospital Basel, Basel, Switzerland