Funding for this research was provided by:
National Institute on Drug Abuse (R21 DA042702, R01 DA029910)
Fogarty International Center (FIC TW09338)
Received: 11 February 2020
Accepted: 21 October 2020
First Online: 31 October 2020
Ethics approval and consent to participate
: All participants provided written informed consent in Kyrgyz or Russian. Ethics approval was obtained from Yale University Human Investigations Committee (IRB), including a prisoner representative, and from the Department of Health and Human Services, Office for Human Research Protections (OHRP). Ethics approval also was obtained from the Committee on Bioethics under the Global Research Institute in Kyrgyz Republic and the University of Illinois Chicago.
: Not applicable.
: The authors declare that they have no competing interests.