Koyama, Jun http://orcid.org/0000-0002-0644-4433
Minamisawa, Masatoshi
Sekijima, Yoshiki
Kuwahara, Koichiro
Katsuyama, Tsutomu
Maruyama, Kazutoshi
Article History
Received: 18 January 2019
Revised: 29 January 2019
Accepted: 30 January 2019
First Online: 11 February 2019
Compliance with ethical standards
:
: Jun Koyama, Masatoshi Minamisawa, Yoshiki Sekijima, Koichiro Kuwahara, Tsutomu Katsuyama, and Kazutoshi Maruyama declare that they have no conflict of interest.