Yokota, Mutsumi
Hatakeyama, Hideyuki
Ono, Yasuha
Kanazawa, Miyuki
Goto, Yu-ichi
Article History
Received: 2 September 2016
Revised: 14 November 2016
Accepted: 16 December 2016
First Online: 12 January 2017
Competing interests
: The authors declare no conflict of interest.