Nobuhiro Tsuchiya, Yu Sawada, Itaru Endo, Department of Gastroenterological Surgery, Graduate School of Medicine, Yokohama City University, Yokohama 236-0027, Japan
Nobuhiro Tsuchiya, Keigo Saito, Yasushi Uemura, Tetsuya Nakatsura, Division of Cancer Immunotherapy, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, Kashiwa 277-8577, Japan
Author contributions: Tsuchiya N and Nakatsura T drafted the manuscript; Sawada Y, Endo I, Saito K and Uemura Y revised the manuscript.
Conflict-of-interest statement: The authors have no conflicts of interest or financial ties to disclose.
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: Tetsuya Nakatsura, MD, PhD, Chief, Division of Cancer Immunotherapy, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, 6-5-1 Kashiwanoha, Kashiwa 277-8577, Japan. email@example.com
Telephone: +81-4-71315490 Fax: +81-4-71336606
Received: March 17, 2015
Peer-review started: March 18, 2015
First decision: April 23, 2015
Revised: May 21, 2015
Accepted: August 31, 2015
Article in press: August 31, 2015
Published online: October 7, 2015