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Authors
Ikei, Harumi https://orcid.org/0000-0001-5126-9198
Miyazaki, Yoshifumi https://orcid.org/0000-0002-3170-6810
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Funding
Funding for this research was provided by:
Tokyo Log Wholesalers’ Association
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Article History
Received: 9 January 2020
Accepted: 10 April 2020
First Online: 22 April 2020
Ethics approval and consent to participate
: This study was conducted in accordance with the Declaration of Helsinki and adhered to the regulations set by the Ethics Committee of the Center for Environment, Health, and Field Sciences, Chiba University, Japan (Project Identification Code Number 34). This study is registered in the University Hospital Medical Information Network of Japan (Unique ID issued by UMIN: UMIN000032808).
: The authors declare that they have no competing interests.
