Funding for this research was provided by:
Fogarty International Center (TW009343)
National Institute on Drug Abuse (R01 DA039073, T32 DA023356)
National Institute of Allergy and Infectious Diseases (P30 AI036214)
Received: 26 April 2021
Accepted: 8 June 2021
First Online: 26 July 2021
: All participants signed written informed consent, and the study protocol was approved by the UCSD Human Research Protections Program and the IRB of the Xochicalco University, Mexico.
: Not applicable.
: The authors declare that they have no competing interests.