Kawai, Kiyotaka
Harada, Tatsuya
Ishikawa, Tomonori
Sugiyama, Rikikazu
Kawamura, Toshihiro
Yoshida, Atsumi
Tsutsumi, Osamu
Ishino, Fumitoshi
Kubota, Toshiro
Kohda, Takashi
Article History
Received: 20 October 2017
Accepted: 22 January 2018
First Online: 5 February 2018
Competing Interests
: The authors declare that they have no competing interests.