Sagawa, Tamotsu
Sato, Yasushi
Hirakawa, Masahiro
Hamaguchi, Kyoko
Fukuya, Akira
Okamoto, Koichi
Miyamoto, Hiroshi
Muguruma, Naoki
Fujikawa, Koshi
Takahashi, Yasuo
Takayama, Tetsuji
Article History
Received: 1 March 2020
Accepted: 2 November 2020
First Online: 13 November 2020
Competing interests
: The authors declare no competing interests.