Yamagishi, Makoto
Katano, Harutaka
Hishima, Tsunekazu
Shimoyama, Tatsu
Ota, Yasunori
Nakano, Kazumi
Ishida, Takaomi
Okada, Seiji
Watanabe, Toshiki
Article History
Received: 30 September 2015
Accepted: 6 November 2015
First Online: 7 December 2015
Competing interests
: The authors declare no competing financial interests.