Kaneko, Tetsuya
Okamura, Koichi http://orcid.org/0000-0003-4523-7514
Yonemoto, Yukio
Okura, Chisa
Suto, Takahito
Tachibana, Masahiro
Sakane, Hideo
Inoue, Makoto
Chikuda, Hirotaka
Article History
Received: 10 July 2019
Accepted: 17 October 2019
First Online: 29 October 2019
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board in Gunma University. Appropriate consents, permissions and releases were obtained.
: Not applicable.
: The authors declare that they have no competing interests.