Tatsuo Kanda, Sadahisa Ogasawara, Tetsuhiro Chiba, Yuki Haga, Osamu Yokosuka, Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, Chuo-ku, Chiba 260-8677, Japan
Masao Omata, Yamanashi Hospitals (Central and Kita) Organization, Kofu-shi, Yamanashi 400-8506, Japan
Masao Omata, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
Author contributions: Kanda T, Ogasawara S, Chiba T, Haga Y, Omata M and Yokosuka O contributed to this paper.
Conflict-of-interest statement: Dr. Sadahisa Ogasawara, Dr. Tetsuhiro Chiba, Dr. Yuki Haga and Professor Masao Omata have no conflict of interest to declare. Dr. Tatsuo Kanda reports receiving lecture fees from Chugai Pharmaceutical, MSD, Tanabe-Mitsubishi, Daiichi-Sankyo, and Bristol-Myers Squibb, and Professor Osamu Yokosuka reports receiving grant support from Chugai Pharmaceutical, Bayer, MSD, Daiichi-Sankyo, Tanabe-Mitsubishi, and Bristol-Myers Squibb.
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: Tatsuo Kanda, MD, PhD, Associate Professor, Department of Gastroenterology and Nephrology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8677, Japan. email@example.com
Telephone: +81-43-2262086 Fax: +81-43-2262088
Received: February 20, 2015
Peer-review started: February 22, 2015
First decision: April 27, 2015
Revised: May 2, 2015
Accepted: June 4, 2015
Article in press: June 8, 2015
Published online: July 28, 2015