Funding for this research was provided by:
National Institute of Allergy and Infectious Diseases (1R01AI114310)
Fogarty International Center (1D43TW009532)
Received: 26 June 2019
Accepted: 9 December 2019
First Online: 16 December 2019
Change Date: 27 February 2020
Change Type: Correction
Change Details: After publication of the original article , the authors would like to add a co-author, Dr. Stephen Pan, who contributed sufficiently to this manuscript.
Ethics approval and consent to participate
: Ethics review committees in China (Guangdong Provincial Center for Skin Diseases and STI Control) and the United States (University of North Carolina at Chapel Hill) approved the study prior to launch. All participants agreed to informed consent and signed the inform consent prior to the survey. All the participants are Chinese, and they resided in China, and this study received ethical approval from a Chinese IRB committee.
: Not Applicable.
: Joseph D. Tucker is a Section Editor at BMC Infectious Diseases and the authors reported no other conflict of interest.