Clinicopathological features and survival for gallbladder NEN : A 2 population-based study 3

1 Clinicopathological features and survival for gallbladder NEN: A 2 population-based study 3 Dong Cen1, 2, Hui Liu1, Zhe Wan1, 2, Zhongjie Lin1, 2, Yanting Wang3, Junjie Xu1, 2*, Yuelong 4 Liang1, 2* 5 1. Key Laboratory of Laparoscopic Technology of Zhejiang Province, Sir Run-Run Shaw 6 Hospital, Zhejiang University School of Medicine, Hangzhou, China 7 2. Department of General Surgery, Sir Run-Run Shaw Hospital, Zhejiang University School of 8 Medicine, Hangzhou, China 9 3. Department of Internal Medicine, John H Stroger Hospital of Cook County, Chicago, IL, USA 10 11 *Corresponding author 12 Yuelong Liang 13 Key Laboratory of Laparoscopic Technology of Zhejiang Province, Department of General 14 Surgery, Sir Run-Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 15 310016, China 16 Email address: 3312019@zju.edu.cn 17 18 Short title: Clinicopathology and survival for GB-NENs 19