Okuhara, Yoshitaka
Asakura, Masanori
Orihara, Yoshiyuki
Morisawa, Daisuke
Matsumoto, Yuki
Naito, Yoshiro
Tsujino, Takeshi
Ishihara, Masaharu
Masuyama, Tohru
Article History
Received: 6 May 2019
Accepted: 5 November 2019
First Online: 21 November 2019
Competing interests
: The authors declare no competing interests.