Nakashima, Hirotaka http://orcid.org/0000-0002-2386-1933
Kawahira, Hiroshi
Kawachi, Hiroshi
Sakaki, Nobuhiro
Article History
Received: 5 March 2020
Accepted: 23 April 2020
First Online: 7 May 2020
Compliance with ethical standards
:
: The authors declare no conflict of interest.
: All procedures involving human participants were performed in accordance with the ethical standards of the institutional and national research committee and with the Helsinki Declaration of 1964 and later versions. The study was approved by the institutional ethics committee (Approval Number: 15–02 in 2015).
: The authors obtained written agreement to participation in this study from all 512 subjects.
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