Takekawa, Norihiro
Terahara, Naoya
Kato, Takayuki
Gohara, Mizuki
Mayanagi, Kouta
Hijikata, Atsushi
Onoue, Yasuhiro
Kojima, Seiji
Shirai, Tsuyoshi
Namba, Keiichi
Homma, Michio
Article History
Received: 9 June 2016
Accepted: 20 July 2016
First Online: 17 August 2016
Competing interests
: The authors declare no competing financial interests.