Shirakawa, Sachiyo http://orcid.org/0000-0003-4608-4863
Toyama, Hirochika
Kido, Masahiro
Fukumoto, Takumi
Article History
Received: 25 April 2020
Accepted: 6 July 2020
First Online: 14 July 2020
Ethics approval and consent to participate
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: Not applicable.
: The authors have no competing interests.