Kato, Shinya
Inaba, Kensuke
Sugawa, Seiji
Shibata, Kosuke
Yamamoto, Ryuta
Yamashita, Makoto
Takahashi, Yoshiro
Article History
Received: 26 November 2015
Accepted: 16 March 2016
First Online: 20 April 2016
Competing interests
: The authors declare no competing financial interests.