Yamaguchi, Kiyoshi
Nagayama, Satoshi
Shimizu, Eigo
Komura, Mitsuhiro
Yamaguchi, Rui
Shibuya, Tetsuo
Arai, Masami
Hatakeyama, Seira
Ikenoue, Tsuneo
Ueno, Masashi
Miyano, Satoru
Imoto, Seiya
Furukawa, Yoichi
Article History
Received: 10 February 2016
Accepted: 22 April 2016
First Online: 24 May 2016
Competing interests
: The authors declare no competing financial interests.