Funding for this research was provided by:
National Heart, Lung, and Blood Institute (U01 HL103561, U01 HL103622, U01 HL103629, U01 HL103620)
Eunice Kennedy Shriver National Institute of Child Health and Human Development (U01 HD068890)
Received: 26 February 2019
Accepted: 11 July 2019
First Online: 9 September 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Boards on research involving human subjects at University of North Carolina at Chapel Hill (IRB Number 10–0752), University of Minnesota (IRB Number 1005S81634), Vanderbilt University (IRB Number 120643), Stanford University (IRB Number 19311) and Case Western Reserve University (IRB Number is 01–12-09). For each study, written parental consent was obtained for the minor child to participate in the study. The two studies with older children (at Case Western Reserve University and Stanford University) also obtained written assent from children.
: Not applicable.
: The authors declare that they have no competing interests. None of the authors reported any financial conflicts of interest related to the present article.