1. Department of Gastroenterology, National Cancer Center, Goyang-si 10408, Republic of Korea
2. Department of Statistics and Actuarial Science, Soongsil University, Seoul 06978, Republic of Korea
3. Department of Internal Medicine, Healthcare Research Institute, Seoul National University Hospital Healthcare System Gangnam Center, Seoul 06236, Republic of Korea
4. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam-si 13620, Republic of Korea
5. Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul 03080, Republic of Korea