1. Department of Hospital Medicine, Inha University Hospital, Inha University School of Medicine, Incheon, Korea.
2. Department of Hospital Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Biomedical Sciences, Inha University Hospital, Inha University School of Medicine, Incheon, Korea.
4. Department of Internal Medicine, Inha University Hospital, Inha University School of Medicine, Incheon, Korea.