Funding for this research was provided by:
National Institute of Occupational Safety and Health, Japan (N-P02-02)
Article History
Received: 1 June 2022
Accepted: 8 December 2022
First Online: 23 December 2022
Declarations
:
: The authors have no competing interests to declare that are relevant to the content of this article. This study was financially supported by Industrial Disease Clinical Research Grants from the Japanese Ministry of Health, Labour and Welfare (180902–01) and by funding from the National Institute of Occupational Safety and Health, Japan (N-P02-02).
: This study was conducted in accordance with the guidelines proposed in the Declaration of Helsinki. The Ethical Committee of the National Institute of Occupational Safety and Health, Japan reviewed and approved the study protocol (ID H2744 and 2019N35).
: Written informed consent was obtained from all participants after explaining to them the aims and design of this study.