1. Center for Medical Genetics and Molecular Medicine; Haukeland University Hospital; Bergen Norway
2. Department of Ophthalmology; Haukeland University Hospital; Bergen Norway
3. Department of Clinical Medicine; University of Bergen; Bergen Norway
4. Division of Child and Adolescent Health; Medical Genetics Department; University Hospital of North Norway; Tromsø Norway
5. Department of Pathology and Medical Genetics; St. Olav's University Hospital; Trondheim Norway
6. Department of Clinical Science; University of Bergen; Bergen Norway