Nagamine, Kuniaki
Sato, Hirotaka
Kai, Hiroyuki http://orcid.org/0000-0002-3544-9196
Kaji, Hirokazu
Kanzaki, Makoto
Nishizawa, Matsuhiko
Article History
Received: 9 August 2017
Accepted: 23 January 2018
First Online: 2 February 2018
Competing Interests
: The authors declare that they have no competing interests.