1. Department of Ophthalmology Sungkyunkwan University School of Medicine, Samsung Medical Center Seoul Korea
2. Department of Clinical Research Design and Evaluation, Samsung Advanced Institute for Health Sciences and Technology Sungkyunkwan University Seoul Korea
3. Department of Neurology Sungkyunkwan University School of Medicine, Samsung Medical Center Seoul Korea
4. Neuroscience Center Samsung Medical Center Seoul Korea
5. Department of Statistics and Actuarial Science Soongsil University Seoul Korea
6. Department of Family Medicine and Supportive Care Center, Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Korea
7. Department of Family Medicine Hallym University Dongtan Hospital Hwasung Korea
8. Department of Clinical Study Design and Evaluation, Samsung Advanced Institute for Health Sciences and Technology (SAIHST) Sungkyunkwan University Seoul Korea