Funding for this research was provided by:
Japan Society for the Promotion of Science (18K10974)
Article History
Received: 19 May 2020
Accepted: 2 August 2020
First Online: 12 August 2020
Ethics approval and consent to participate
: This study was approved by the Human Ethics Committee of Toyo University and was conducted in accordance with the Declaration of Helsinki except for registration in a database. All subjects provided written and verbal informed consent after receiving a detailed explanation of the purpose, procedures, and risks of the study.
: Not applicable.
: The authors declare that they have no competing interests.