Hirashima, Shingo
Ohta, Keisuke
Kanazawa, Tomonoshin
Okayama, Satoko
Togo, Akinobu
Uchimura, Naohisa
Kusukawa, Jingo
Nakamura, Kei-ichiro
Article History
Received: 17 October 2016
Accepted: 21 November 2016
First Online: 20 December 2016
Competing interests
: The authors declare no competing financial interests.