Matsumoto, Takashi
Kushida, Hirotaka
Matsushita, Shoko
Oyama, Yoshiyuki
Suda, Takafumi
Watanabe, Junko
Kase, Yoshio
Setou, Mitsutoshi
Article History
Received: 23 November 2016
Accepted: 2 February 2017
First Online: 8 March 2017
Competing interests
: The authors of this manuscript have the following competing interests: T.M., H.K., J.W., and Y.K. are employees of Tsumura & Co. S.M., Y.O., T.S., and M.S. have no conflicts of interest to declare.