Funding for this research was provided by:
National Institute of Environmental Health Sciences (P50ES018176)
National Center for Advancing Translational Sciences (KL2TR001077)
U.S. Environmental Protection Agency (83615201 and 83451001)
Received: 5 January 2019
Accepted: 25 April 2019
First Online: 21 May 2019
Ethics approval and consent to participate
: Approved by the NCHS Research Ethics Review Board, and all study participants gave written consent for participation.
: Not applicable.
: The authors declare that they have no competing interests.