Funding for this research was provided by:
National Institute of Mental Health (K23MH086111, RC1MH088791, R21MH092615)
Eunice Kennedy Shriver National Institute of Child Health and Human Development (P30HD026979)
Pennsylvania Department of Health (SAP #4100042728, SAP #4100047863)
Robert Wood Johnson Foundation (#6672)
European Community's Seventh Framework Programme (n°602407)
Received: 24 April 2017
Accepted: 16 January 2018
First Online: 30 January 2018
Ethics approval and consent to participate
: All study procedures were approved by the institutional review board of the Children’s Hospital of Philadelphia. Written informed consent was obtained from all participants and their parents or legal guardians.
: Not applicable.
: The authors declare that they have no competing interests.
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