Kasai, Hiroshi http://orcid.org/0000-0003-0746-2585
Kawai, Kazuaki
Article History
Received: 21 May 2021
Accepted: 27 June 2021
First Online: 9 July 2021
Declarations
:
: The study was approved by the Ethics Committee of Medical Research, University of Occupational and Environmental Health, Japan (R3-005).
: Not applicable.
: The authors declare that they have no competing interests.