Funding for this research was provided by:
Japan Society for the Promotion of Science (JP17K13057 and JP20K11158)
Article History
Received: 24 October 2020
Accepted: 24 December 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: The study protocol complied with the Declaration of Helsinki and was approved by the ethics committee of University of the Ryukyus for Medical and Health Research Involving Human Subjects (#226). All patients provided written imformed consent.
: Not applicable.
: The authors declare that they have no competing interests.