Funding for this research was provided by:
National Institute of Environmental Health Sciences (P01ES022845, K99ES027853, T32ES013678, P30ES007048, 5P30ES07048)
U.S. Environmental Protection Agency (RD-83544101–0)
Received: 27 March 2018
Accepted: 26 July 2018
First Online: 14 September 2018
Ethics approval and consent to participate
: Informed consents were obtained from parents and assents from children upon recruitment. This study was reviewed and approved by the Institutional Review Board at the University of Southern California.
: Not applicable.
: The authors declare that they have no competing interests.
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