aMaster of Medicine, Hepatological Surgery Department, Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian Province, China bDoctor of Medicine, Hepatological Surgery Department, Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian Province, China Sponsorships or competing interests that may be relevant to content are disclosed at the end of this article Published online ■ ■ *Corresponding author. Address: Doctor of Medicine, Hepatological Surgery Department, Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian Province, China, E-mail address: [email protected] (Y. Lin). This is an open access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal. http://creativecommons.org/licenses/by-nc-nd/4.0/