1. Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Republic of Korea
2. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
3. Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea
4. Department of Intensive Care Unit, Yanbian University Hospital, Yanji, Jilin, China
5. Medical Research Collaborating Center, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Republic of Korea
6. Department of Internal Medicine, Hallym University Kangnam Sacred Heart Hospital, Seoul, Republic of Korea
7. Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Republic of Korea
8. Department of Internal Medicine, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Republic of Korea