Funding for this research was provided by:
Center for AIDS Research, Duke University (5P30 AI064518)
Received: 8 July 2019
Accepted: 5 November 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: All study procedures were approved by the ethical review boards at Duke University, Muhimbili University of Health and Allied Sciences, and the National Institute of Medical Research of Tanzania. All participants provided written assent and written consent was obtained from their parents.
: Not Applicable.
: The authors declare that they have no competing interests.