1 Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation and Department of Hepato-Pancreato-Biliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 510120, Guangzhou, China.
2 Faculty of Medicine, Department of Gastroenterology and Hepatology, University Duisburg-Essen, 45147, Essen, Germany.
3 Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation and Department of Hepato-Pancreato-Biliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 510120, Guangzhou, China. doctorrui@126.com.
4 Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation and Department of Hepato-Pancreato-Biliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 510120, Guangzhou, China. mdliuchao@hotmail.com.