1. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
2. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
3. Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea
4. Korea Institute of Oriental Medicine, Daejeon, Republic of Korea
5. Department of Internal Medicine, Seoul Metropolitan Government Boramae Medical Center, Seoul, Republic of Korea