Funding for this research was provided by:
National Institute of Environmental Health Sciences (R01-ES026578, P30-ES017885, R21-ES020811, R01-ES026964)
National Institute for Occupational Safety and Health (T42-OH008455)
Directorate for Mathematical and Physical Sciences (NSF DMS 1406712)
Received: 1 June 2017
Accepted: 21 September 2017
First Online: 26 September 2017
Ethics approval and consent to participate
: NHANES is a publicly available data set and all participants in NHANES provide written informed consent, consistent with approval by the National Center for Health Statistics Institutional Review Board.
: Not Applicable.
: The authors declare that they have no competing interests.
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