Received: 31 August 2018
Accepted: 25 January 2019
First Online: 1 February 2019
Ethics approval and consent to participate
: The San Diego State University Institutional Review Board approved the study (Protocol No. 1013089). Written informed assent and consent for participation was obtained from participants and their parents, respectively.
: Not applicable.
: The authors declare that they have no competing interests.
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