Funding for this research was provided by:
National Institute of Allergy and Infectious Diseases (1R01AI114310)
Doris Duke Charitable Foundation
Received: 8 May 2017
Accepted: 23 February 2018
First Online: 2 March 2018
Ethics approval and consent to participate
: Ethical approval was obtained from institutional review boards at the Guangdong Provincial Center for Skin Diseases and Sexually Transmitted Infections Control (IRB number 1R01AI114310–01), the University of North Carolina at Chapel Hill (IRB number 14–1865), and the University of California San Francisco (IRB number 14–14887). All participants signed an online informed consent form prior to beginning the survey detailing what information would be collected and what the data would be used for. Those who refused to sign the informed consent were not allowed to proceed with the survey.
: Not applicable.
: The authors declare that they have no competing interests.
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