Funding for this research was provided by:
National Institutes of Health (R01DK098072 and DK056350)
Carolina Population Center, University of North Carolina at Chapel Hill (NIH P2C HD050924)
Article History
Received: 11 February 2019
Accepted: 18 June 2019
First Online: 26 June 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.