Terakawa, Toshiko
Kato, Aitaro
Yamanaka, Yoshiko
Maeda, Yuta
Horikawa, Shinichiro
Matsuhiro, Kenjiro
Okuda, Takashi
Article History
Received: 27 July 2015
Accepted: 21 January 2016
First Online: 19 February 2016
Competing interests
: The authors declare no competing financial interests.