Funding for this research was provided by:
National Institute of Child Health and Human Development (R01-HD089390, U54-HD086984)
National Institute of Mental Health (R01-MH117807, R01-MH073084)
Pennsylvania Department of Health (4100047863, 4100042728)
Received: 9 September 2019
Accepted: 29 November 2019
First Online: 11 December 2019
Ethics approval and consent to participate
: Data collection and use was approved by the institutional review board (IRB) at Children’s Hospital of Philadelphia and the University of Pennsylvania. All participants or their legal guardians gave their consent for research and publication purposes.
: Not applicable.
: The authors declare that they have no competing interests.