1. Division of General Practice, Department of Medical Education, Changhua Christian Hospital, Changhua, Taiwan, R.O.C.
2. Department of Ophthalmology, Changhua Christian Hospital, Changhua, Taiwan, R.O.C.
3. Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung, Taiwan, R.O.C.