1Department of Gastrointestinal Surgery, West China Hospital, Sichuan University, Chengdu, China
Correspondence: Xiao-Ting Wu, MD, FACS, Department of Gastrointestinal Surgery, West China Hospital, Sichuan University, 37 Guo Xue Rd, Chengdu 610041, Sichuan Province, China (firstname.lastname@example.org).
Received December 05, 2018
Accepted April 08, 2019
Online date: June 25, 2019
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