1. Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Republic of Korea
2. Department of Pathology, Konkuk University School of Medicine, Seoul, Republic of Korea
3. Department of Internal Medicine, University of Kyunghee College of Medicine, Seoul, Republic of Korea
4. Department of Internal Medicine, The Catholic University College of Medicine, Seoul, Republic of Korea
5. Department of Internal Medicine, Pusan National University School of Medicine, Busan, Republic of Korea
6. Department of Internal Medicine, Soonchunhyang University College of Medicine, Cheonan, Republic of Korea