Funding for this research was provided by:
National Institute on Drug Abuse (K24 DA017072)
National Institute of Arthritis and Musculoskeletal and Skin Diseases (AR060231-05)
United States Agency for International Development (USAID Respond Project)
First Online: 6 December 2017
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committees (Yale University, Duquesne University) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.