Funding for this research was provided by:
Japan Society for the Promotion of Science (19K17601, 19K09246, 19H03739, 18K08761)
Received: 8 June 2020
Accepted: 28 September 2020
First Online: 15 October 2020
Ethics approval and consent to participate
: This study was approved by Institutional Review Boards of Yamaguchi University Hospital (H2019–092) and followed the Declaration of Helsinki and the ethical standards of the responsible committee on human experimentation. All participants granted their informed consent.
: Not applicable.
: Authors declared no conflicts of interest.