Funding for this research was provided by:
Occupational Safety and Health Research Institute (2018-OSHRI-791)
Received: 22 August 2019
Accepted: 12 May 2020
First Online: 24 May 2020
Ethics approval and consent to participate
: Ethics approval for the present study was not required because this manuscript does not use contain clinical or patient data.
: Not applicable.
: The authors declare that they have no conflict of interests.