1. Department of Anesthesiology and Pain Medicine, Laboratory for Cardiovascular Dynamics; University of Ulsan College of Medicine; Seoul South Korea
2. Department of Clinical Epidemiology and Biostatistics; University of Ulsan College of Medicine; Seoul South Korea
3. Division of Hepatobiliary Surgery and Liver Transplantation, Department of Surgery, Asan Medical Center; University of Ulsan College of Medicine; Seoul South Korea