Tochikubo, O
Nakamura, H
Jinzu, H
Nagao, K
Yoshida, H
Kageyama, N
Miyano, H
Article History
Received: 21 July 2015
Revised: 27 November 2015
Accepted: 18 December 2015
First Online: 29 February 2016
Competing interests
: OT received research grants from Ajinomoto Co., Inc. HN, HJ, KN, HY, NK and HM are employees of Ajinomoto Co., Inc. No other potential conflicts of interest relevant to this article are declared.