Funding for this research was provided by:
National Institute for Occupational Safety and Health (NIOSH), Centers for Disease Control and Prevention (OH008434)
Text and Data Mining valid from 2018-09-24
Received: 2 July 2018
Accepted: 6 September 2018
First Online: 24 September 2018
Ethics approval and consent to participate
: Approval to conduct this study was obtained from the Institutional Review Board at the University of Minnesota. This research effort used a publically available data that was available in a de-identified form. Since the authors did not directly contact any of the participants, consent was not needed.
: Not applicable.
: The authors declare that they have no competing interests.
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