Funding for this research was provided by:
Newton Fund (NIF\R1\181020)
Foundation for the National Institutes of Health (NIAID 1R01AI114310-01)
Center for AIDS Research, University of North Carolina at Chapel Hill (NIAID 5P30AI050410)
North Carolina Translational and Clinical Sciences Institute, University of North Carolina at Chapel Hill (1UL1TR001111)
UNC-South China STD Research Training Center (FIC 1D43TW009532-01)
SMU Research Initiation Project (QD2017N030, C1034448)
Text and Data Mining valid from 2020-03-27
Received: 8 December 2019
Accepted: 17 March 2020
First Online: 27 March 2020
Ethics approval and consent to participate
: Ethical approval was obtained from Guangzhou Center for Diseases Control and Prevention. Online informed consent was obtained prior to the commencement of the survey questionnaire. The form of consent was approved by the ethics committee.
: Not applicable.
: The authors declare that they have no competing interests.