Takauji, Yuki
Wada, Takumi
Takeda, Asuka
Kudo, Ikuru
Miki, Kensuke
Fujii, Michihiko
Ayusawa, Dai
Article History
Received: 27 May 2015
Accepted: 24 November 2015
First Online: 5 January 2016
Competing interests
: The authors declare no competing financial interests.