Funding for this research was provided by:
Text and Data Mining valid from 2018-09-17
Received: 13 April 2018
Accepted: 20 August 2018
First Online: 17 September 2018
Ethics approval and consent to participate
: For the clinical trial from which the data used in study was derived, consent was obtained from parents and teens, and the study protocols were reviewed and approved by the University of Iowa Institutional Review Board.
: Not applicable.
: The authors declare that they have no competing interests.
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