1. Department of Ophthalmology, Changhua Christian Hospital, Changhua, Taiwan
2. Department of Optometry, Da-Yeh University, Changhua, Taiwan
3. College of Medicine, Chung-Shan Medical University, Taichung, Taiwan
4. Department of Ophthalmology, National Taiwan University Hospital, Taipei, Taiwan
5. College of Medicine, National Taiwan University, Taipei, Taiwan