Funding for this research was provided by:
NIH (UM1 AI069503)
Received: 10 June 2019
Accepted: 1 April 2020
First Online: 16 April 2020
Ethics approval and consent to participate
: The DC Cohort is approved by the George Washington University Institutional Review Board (IRB #071029) and all participants signed informed consent to participate. The study protocol, consent forms, and research instruments were approved by the George Washington University IRB, the DC Department of Health (DOH) IRB, and the IRBs of the individual clinics.
: Not applicable.
: The authors declare that they have no competing interests.