About the Authors

Yangbo Sun

Affiliation School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, SAR, China

Chao Qiang Jiang

Affiliation Guangzhou Number 12 Hospital, Guangzhou, China

Kar Keung Cheng

Affiliation Department of Public Health and Epidemiology, University of Birmingham, Birmingham, United Kingdom

Wei Sen Zhang

Affiliation Guangzhou Number 12 Hospital, Guangzhou, China

Gabriel M. Leung

Affiliation School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, SAR, China

Tai Hing Lam

hrmrlth@hkucc.hku.hk

Affiliation School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, SAR, China

C. Mary Schooling

Affiliations School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, SAR, China, School of Public Health, CUNY, New York City, New York, United States of America

Competing Interests

C. M. Schooling is member of the Editorial Board of PLOS ONE. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: CQJ THL KKC. Performed the experiments: YS CMS GML. Analyzed the data: YS CMS GML. Contributed reagents/materials/analysis tools: WSZ. Wrote the paper: YS CMS.