Funding for this research was provided by:
Parents and Professors' Association, Kitasato University School of Medicine
Received: 30 September 2020
Accepted: 5 November 2020
First Online: 19 November 2020
Ethics approval and consent to participate
: All experimental protocols were approved by the Ethics Review Board of Kitasato University (Permission number: B20-133).
: Not applicable.
: The authors declare that they have no competing interests.