Funding for this research was provided by:
National Institute of Mental Health (R01MH115765, R25MH067127)
National Institute on Drug Abuse (R01DA018621)
Text and Data Mining valid from 2019-10-04
Received: 10 August 2018
Revised: 23 March 2019
Accepted: 1 April 2019
First Online: 4 October 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: This research was approved by the Institutional Review Board at the Public Health Institute, Oakland, University of California, San Francisco, and University of Oxford, Oxford, UK. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.