Shojima, Kensaku
Sato, Akira
Hanaki, Hideaki
Tsujimoto, Ikuko
Nakamura, Masahiro
Hattori, Kazunari
Sato, Yuji
Dohi, Keiji
Hirata, Michinari
Yamamoto, Hideki
Kikuchi, Akira
Article History
Received: 17 October 2014
Accepted: 29 December 2014
First Online: 27 January 2015
Competing interests
: M.N., K.H., Y.S., K.D., M.H. are employees of Shionogi & Co., Ltd. A.K. has received research funds from Shionogi & Co., Ltd. All remaining authors have declared no conflicts of interest.