1. Department of Gastroenterology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China
2. Department of Molecular Genetic Laboratory, College of Medicine, the Catholic University of Korea, Seoul, Republic of Korea
3. Department of Clinical Pathology, College of Medicine, the Catholic University of Korea, Seoul, Republic of Korea
4. Department of Obstetrics and Gynecology, College of Medicine, the Catholic University of Korea, Seoul, Republic of Korea
5. Department of Biostatistics, College of Medicine, the Catholic University of Korea, Seoul, Republic of Korea
6. The Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
7. Department of Hepatobiliary, Surgery, Peking University People’s Hospital, Beijing, China