1. Department of Ophthalmology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand 2Department of Ophthalmology, University of California, San Francisco Medical School, San Francisco, California, United States
2. Department of Ophthalmology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
3. Biostatistics Center, Research Affairs, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
4. Department of Ophthalmology, University of California, San Francisco Medical School, San Francisco, California, United States