1 Department of Human Genetics and Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands. Frans.Cremers@radboudumc.nl.
2 Department of Ophthalmology, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands. C.J.F.Boon@lumc.nl.
3 Academic Medical Center, Department of Ophthalmology, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands. C.J.F.Boon@lumc.nl.
4 Ocular Genomics Institute, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA 02114, USA. Kinga_Bujakowska@MEEI.HARVARD.EDU.
5 Sorbonne Université, INSERM, CNRS, Institut de la Vision, Department of Genetics, 17 rue Moreau, 75012 Paris, France. christina.zeitz@inserm.fr.