1. Pancreas Institute of Nanjing Medical University, Nanjing, People’s Republic of China
2. Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People’s Republic of China
3. Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People’s Republic of China
4. Department of General Surgery, The People’s Hospital of Bozhou, Bozhou, Anhui, People’s Republic of China
5. 5Department of Pediatric Surgery, Nanjing Children’s Hospital Affiliated to Nanjing Medical University, Nanjing, People’s Republic of China