About the Authors

Hui Pan

Affiliation Shantou-Oxford Clinical Research Unit, Shantou University Medical College, Shantou, Guangdong, P.R. China

Binglin Cui

Affiliation Shantou-Oxford Clinical Research Unit, Shantou University Medical College, Shantou, Guangdong, P.R. China

Dangui Zhang

Affiliation Shantou-Oxford Clinical Research Unit, Shantou University Medical College, Shantou, Guangdong, P.R. China

Jeremy Farrar

Affiliations Shantou-Oxford Clinical Research Unit, Shantou University Medical College, Shantou, Guangdong, P.R. China, Oxford University Clinical Research Unit, Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Ho Chi Minh City, Viet Nam

Frieda Law

Affiliation Consultant Office, Shantou University Medical College, Shantou, Guangdong, P.R. China

William Ba-Thein

wbathein@stu.edu.cn

Affiliations Shantou-Oxford Clinical Research Unit, Shantou University Medical College, Shantou, Guangdong, P.R. China, Department of Microbiology and Immunology, Shantou University Medical College, Shantou, Guangdong, P.R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HP WB-T. Performed the experiments: HP WB-T. Analyzed the data: HP BC DZ WB-T. Wrote the paper: HP WB-T. Translated the questionnaire from English into Chinese: HP BC DZ FL. Validated questionnaire and analysis: BC DZ JF FL.