Funding for this research was provided by:
National Institute on Drug Abuse (R01 DA041063)
Received: 3 April 2019
Accepted: 27 May 2019
First Online: 14 June 2019
Ethics approval and consent to participate
: This trial was approved by Columbia University’s IRB and by the ethics committee of the Kazakhstan School of Public Health (KSPH).This study was funded to Drs. El-Bassel (PI) and Louisa Gilbert (PI). The grant number is R01 DA041063. The funder was not involved in study design or analysis.
: Not applicable
: The authors declare that they have no competing interests.