Funding for this research was provided by:
Japanese Ministry of Health, Labour and Welfare (26460910 and 17K09340)
Received: 14 June 2019
Accepted: 3 July 2020
First Online: 17 July 2020
Ethics approval and consent to participate
: All participants provided written informed consent at the time of admission, and the study protocol was approved by the Kyushu University Research and Ethics Committee [CitationRef removed–CitationRef removed].
: All participants provided consent for publication.
: The authors declare that they have no competing interests.