Funding for this research was provided by:
Centers for Disease Control and Prevention (U01 IP00113801-01)
University of Michigan Center for Occupational Health & Safety Engineering
Received: 13 September 2020
Accepted: 18 December 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: This study was not subject to review by the University of Michigan Health Sciences IRB because it used publicly available data.
: Not applicable.
: The authors declare that they have no competing interests.