Matsushima, Nobuo
Utsugi, Mitsuru
Takakura, Shinichi
Yamasaki, Tadashi
Hata, Maki
Hashimoto, Takeshi
Uyeshima, Makoto
Article History
Received: 27 November 2019
Accepted: 18 April 2020
First Online: 7 May 2020
Consent for publication
: Not applicable.
: The authors declare that there are no competing interests.