Fujisawa, Koichi
Takami, Taro
Kimoto, Yoshitaka
Matsumoto, Toshihiko
Yamamoto, Naoki
Terai, Shuji
Sakaida, Isao
Article History
Received: 27 September 2015
Accepted: 13 January 2016
First Online: 10 February 2016
Competing interests
: The authors declare no competing financial interests.