University of North Carolina at Chapel Hill Project-China, Guangzhou, China; University of North Carolina at Chapel Hill, Institute of Global Health and Infectious Diseases, USA; London School of Hygiene and Tropical Medicine, UK; Corresponding author: Joseph D Tucker, University of North Carolina at Chapel Hill Project-China, Number 2 Lujing Road, Guangzhou, China, 510095
J. Ong
University of North Carolina at Chapel Hill Project-China, Guangzhou, China; London School of Hygiene and Tropical Medicine, UK
D. Conserve
Arnold School of Public Health, Columbia, SC, USA
S. Pan
University of North Carolina at Chapel Hill Project-China, Guangzhou, China; University of North Carolina at Chapel Hill, Institute of Global Health and Infectious Diseases, USA
W. Tang
University of North Carolina at Chapel Hill Project-China, Guangzhou, China; University of North Carolina at Chapel Hill, Institute of Global Health and Infectious Diseases, USA
