Zenichi Morise, Department of Surgery, Fujita Health University School of Medicine, Toyoake 470-1192, Aichi, Japan
Author contributions: Morise Z collected the data and wrote this paper.
Conflict-of-interest statement: Morise Z declares no conflicts of interest related to this publication.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non-Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Correspondence to: Zenichi Morise, MD, PhD, Professor, Department of Surgery, Fujita Health University School of Medicine, 1-98 Kutsukakecho Toyoake 470-1192, Aichi, Japan. firstname.lastname@example.org
Telephone: +81-562-939246 Fax: +81-562-935125
Received: March 26, 2018
Peer-review started: March 27, 2018
First decision: April 13, 2018
Revised: April 18, 2018
Accepted: May 30, 2018
Article in press: May 30, 2018
Published online: July 27, 2018