1. Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Science Key Lab, Beijing - China
2. Department of Ophthalmology, Beijing Di Tan Hospital, Capital Medical University, Beijing - China
3. Department of Ophthalmology, Medical Faculty Mannheim of the Ruprecht-Karls-University, Heidelberg - Germany