1. Department of Ophthalmology and Visual Science; St. Vincents’ Hospital; College of Medicine; Catholic University of Korea; Seoul Korea
2. Department of Epidemiology and Biostatistics; Harvard School of Public Health; Boston MA USA
3. Departments of Nutrition and Epidemiology; Harvard School of Public Health; Boston MA USA
4. Department of Ophthalmology and Visual Science; St. Daejon's Hosptial; College of Medicine; Catholic University of Korea; Seoul Korea
5. Department of Ophthalmology; Beth Israel Deaconess Medical Center; Harvard Medical School; Boston MA USA