1. Scheie Eye Institute and Perelman Center for Advanced Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
2. Division of Ophthalmology, Children’s Hospital of Philadelphia, and Department of Ophthalmology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
3. Center for Cellular & Molecular Therapeutics, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
4. Department of Ophthalmology and the Center for Medical Genetics, Ghent University and Ghent University Hospital, Ghent, Belgium