1. Department of Hepatobiliary and Pancreatic Surgery, Henan Key Laboratory of Digestive Organ transplantation, The First Affiliated Hospital of Zhengzhou University; Zhengzhou University; Zhengzhou China
2. Department of Transplantation Medicine, Institute of Surgical Research; Oslo University Hospital; Oslo Norway
3. Department of Biosciences; University of Oslo; Oslo Norway
4. Faculty of Medicine, Institute of Clinical Medicine; University of Oslo; Oslo Norway