1. Gastroenterology, Asan Medical Center University of Ulsan College of Medicine Seoul Republic of Korea
2. Clinical Epidemiology and Biostatistics University of Ulsan College of Medicine, Asan Medical Center Seoul Republic of Korea
3. Gastroenterology, Hanyang University College of Medicine Guri Republic of Korea
4. Hepatobiliary Surgery and Liver Transplantation, Surgery, Asan Medical Center University of Ulsan College of Medicine Seoul Republic of Korea
5. Asan Liver Center, Asan Medical Center University of Ulsan College of Medicine Seoul Republic of Korea