Funding for this research was provided by:
JSPS KAKENHI (17K09655)
Received: 29 November 2019
Accepted: 31 May 2020
First Online: 11 June 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Hiroshima University Hospital (IRB33 and M326), and all participants provided written informed consent.
: Not applicable.
: The authors declare that they have any competing interests (both financial and non-financial) related to this manuscript.