1. Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
2. Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
3. Department of Internal Medicine, CHA Bundang Medical Center, CHA University, Seongnam, Korea
4. Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea