Yoshida, Hidekazu
Ujihara, Atsushi
Minami, Masayo
Asahara, Yoshihiro
Katsuta, Nagayoshi
Yamamoto, Koshi
Sirono, Sin-iti
Maruyama, Ippei
Nishimoto, Shoji
Metcalfe, Richard
Article History
Received: 26 February 2015
Accepted: 18 August 2015
First Online: 15 September 2015
Competing interests
: The authors declare no competing financial interests.