Minamikawa, Takeo
Matsuo, Hisataka
Kato, Yoshiyuki
Harada, Yoshinori
Otsuji, Eigo
Yanagisawa, Akio
Tanaka, Hideo
Takamatsu, Tetsuro
Article History
Received: 25 January 2016
Accepted: 19 April 2016
First Online: 5 May 2016
Competing interests
: T.T. has received research financial support from Ushio Inc., Yokohama, Kanagawa, Japan. E.O. has received research financial support from SBI ALApromo Co., Ltd. Y.K. was an employee of Ushio Inc. during this project. T.M., Y.K., Y.H. and T.T. have filed a patent related to this work.