Masai, Hirokazu
Yamada, Yasuhiro
Okumura, Shun
Yanagida, Takayuki
Fujimoto, Yutaka
Kanemitsu, Yoshihiko
Ina, Toshiaki
Article History
Received: 1 June 2015
Accepted: 3 August 2015
First Online: 1 September 2015
Competing interests
: The authors declare no competing financial interests.