Funding for this research was provided by:
Foundation for the National Institutes of Health (R34AI091446 and R01AI094562)
Guangxi Key Laboratory of AIDS Prevention and Treatment (gklapt201901)
Received: 18 March 2019
Accepted: 22 January 2020
First Online: 10 February 2020
Ethics approval and consent to participate
: This study was approved by the institutional review boards of National Center for AIDS/STD Control and Prevention of Chinese Center for Disease Control (No. X120331206) and Prevention and Vanderbilt University with the number (IRB# 111144).Written informed consent was obtained from all individual participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.