1. Department of Medical Informatics, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
2. Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
3. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
4. Allmedicus Research Institute, Allmedicus Co., Ltd., Anyang, Korea.
5. Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.