Funding for this research was provided by:
Japan Agency for Medical Research and Development (19K17676)
Received: 17 April 2021
Accepted: 27 June 2021
First Online: 3 July 2021
: This study was approved by the Ethical Committee for Epidemiology of Hiroshima University (approval number 326) and was conducted in accordance with the ethical standards established in the Helsinki Declaration of 1975. All participants provided written informed consent to use their samples for this study.
: All participants provided written informed consent for publication.
: The authors declare that they have no competing interests.