Funding for this research was provided by:
California HIV/AIDS Research Program (ID09-SF-058)
National Institute of Allergy and Infectious Diseases (3P30AI027763-19S2)
Article History
Received: 23 May 2017
Accepted: 17 July 2017
First Online: 22 July 2017
Compliance with ethical standards
: Each participant signed informed consent forms, and the study received approval from the Committee for Human Research at the University of California San Francisco (UCSF).
: The authors declare that they have no competing interests.