Ono, Takeharu
Azuma, Koichi
Kawahara, Akihiko
Kakuma, Tatsuyuki
Sato, Fumihiko
Kawaguchi, Toshihiko
Akiba, Jun
Umeno, Hirohito
Article History
Received: 13 March 2020
Accepted: 29 June 2020
First Online: 20 July 2020
Competing interests
: The authors declare no competing interests.