Funding for this research was provided by:
Japan Society for the Promotion of Science (26440268)
Received: 22 January 2021
Accepted: 7 April 2021
First Online: 7 May 2021
: This study was approved by the Mount Fuji Research Institute’s ethical committee and was in accordance with the Declaration of Helsinki. The participants voluntarily signed informed consent.
: Not applicable.
: The authors declare that they have no competing interests.