Funding for this research was provided by:
Eunice Kennedy Shriver National Institute of Child Health and Human Development (T32HD0055162-04)
National Heart, Lung, and Blood Institute (T32HL083825)
National Institutes of Health (UL1TR000005, UL1 RR024153)
Text and Data Mining valid from 2018-05-31
Received: 9 February 2018
Accepted: 22 May 2018
First Online: 31 May 2018
Ethics approval and consent to participate
: This study was approved by the University of Pittsburgh, Human Research Protection Office, ID # PRO09050089 and ID# PRO14060316. This body approved an informed consent document that was signed by all study participants.
: The authors declare that they have no competing interests.
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