Funding for this research was provided by:
National Institutes of Health (R01DK094841)
National Institute of Diabetes and Digestive and Kidney Diseases (P30DK0372488)
National Heart, Lung, and Blood Institute (K01HL141589)
Received: 17 October 2019
Accepted: 7 February 2020
First Online: 11 March 2020
Ethics approval and consent to participate
: We obtained written informed consent both at recruitment and soon after delivery from each mother. This study was approved by Duke University Medical Center IRB (human subjects committee) (Pro 00036242).
: Not applicable.
: The authors declare that they have no competing interests.