1. Department of Ophthalmology; Taichung Veterans General Hospital; Taichung Taiwan
2. Wilmer Eye Institute; Johns Hopkins University School of Medicine; Baltimore Maryland USA
3. School of Medicine; National Yang Ming Chiao Tung University; Taipei Taiwan
4. School of Medicine; Chung Shan Medical University; Taichung Taiwan
5. Department of Post-Baccalaureate Medicine, College of Medicine; National Chung Hsing University; Taichung Taiwan
6. Department of Ophthalmology; University of Colorado Anschutz Medical Campus; Aurora Colorado USA
7. Department of Epidemiology; University of Colorado Anschutz Medical Campus; Aurora Colorado USA
8. Division of Population Medicine, School of Medicine; the National Centre for Population Health and Wellbeing Research, Cardiff University; Cardiff UK
9. Department of Family Medicine; Maastricht University (CAPHRI); Maastricht Netherlands