Document is current

Article History

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.

: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.