1. Department of Ophthalmology, Taichung Veterans General Hospital, Taichung City, Taiwan2Department of Ophthalmology, National Yang-Ming University School of Medicine, Taipei, Taiwan
2. National Yang-Ming University School of Medicine, Taipei, Taiwan4Department of Ophthalmology, Taipei Veterans General Hospital, Taipei, Taiwan
3. Department of Public Health and Institute of Public Health, National Yang-Ming University, Taipei, Taiwan
4. Department of Public Health and Institute of Public Health, National Yang-Ming University, Taipei, Taiwan6Community Medicine Research Center, National Yang-Ming University, Taipei, Taiwan