Funding for this research was provided by:
Eunice Kennedy Shriver National Institute of Child Health and Human Development (34879-1459)
Text and Data Mining valid from 2019-11-25
First Online: 25 November 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: All procedures performed in this study involving human participants were in accordance with the Ethical Standards of the Institutional Research Committees (University of California Los Angeles and University of California Riverside) and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Informed consent and assent was obtained from participating parents and youth, respectively. Names of participants were changed and ages included only in years to protect the anonymity of individuals quoted.