1. Pediatric Ophthalmology and Ocular Genetics, Wills Eye Hospital, Philadelphia, Pennsylvania, USA
2. Department of Ophthalmology, Kaohsiung Medical University Hospital, and Department of Ophthalmology, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
3. Retina Service, Wills Eye Hospital, Philadelphia, Pennsylvania, USA
4. Thomas Jefferson University, Philadelphia, Pennsylvania, USA