1. Department of Ophthalmology, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
2. College of Medicine, Chang Gung University, Taoyuan, Taiwan
3. Department of Ophthalmology, Chang Gung Memorial Hospital, Tucheng, Taiwan
4. Department of Ophthalmology, Chang Gung Memorial Hospital, Keelung, Taiwan
5. Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
6. Department of Medical Research, Chung Shan Medical University Hospital, Taichung, Taiwan