1. From the Department of Ophthalmology,
2. the Division of Cardiology,
3. the Division of Rheumatology, Allergy and Immunology, and
4. the Internal Medicine and Health Promotion Center at the Taoyuan Branch, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taipei, Taiwan; and
5. the Department of Public Health and Center of Biostatistics, Chang Gung University, Taipei, Taiwan.