1. Department of Hepatobiliary and Pancreatic Surgery First Affiliated Hospital Zhejiang University School of Medicine Hangzhou 310003 P. R. China
2. Zhejiang Provincial Key Laboratory of Pancreatic Disease Hangzhou 310003 P. R. China
3. Innovation Center for the Study of Pancreatic Diseases Hangzhou 310003 P. R. China
4. Zhejiang Provincial Clinical Research Center for the Study of Hepatobiliary & Pancreatic Diseases Hangzhou 310003 P. R. China
5. Cancer Center Zhejiang University Hangzhou 310058 P. R. China
6. Department of Chemical and Biomolecular Engineering National University of Singapore 4 Engineering Drive 4 Singapore 117585 Singapore
7. Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City Fuzhou 350207 P. R. China