Sugata, Hisato
Hirata, Masayuki
Tamura, Yuichi
Onishi, Hisao
Goto, Tetsu
Araki, Toshihiko
Yorifuji, Shiro
Article History
Received: 14 March 2016
Accepted: 6 March 2017
First Online: 10 April 2017
Competing interests
: The authors declare no competing financial interests.