1. Department of Ophthalmology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan, Republic of China.
2. Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan, Republic of China.
3. Department of Public Health, School of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan, Republic of China.
4. Department of Ophthalmology, Hsin Chu Cathay General Hospital, Hsin Chu, Taiwan, Republic of China.