About the Authors

Xiao-Min Luo

Affiliations Center for Evidence Based Medicine, Peking University Health Science Centre, Peking University, Beijing, China, School of Public Health, Peking University Health Science Centre, Peking University, Beijing, China

Jin-Ling Tang

jltang@cuhk.edu.hk

Affiliations Center for Evidence Based Medicine, Peking University Health Science Centre, Peking University, Beijing, China, Division of Epidemiology, School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong SAR, China

Yong-Hua Hu

Affiliation School of Public Health, Peking University Health Science Centre, Peking University, Beijing, China

Li-Ming Li

Affiliation School of Public Health, Peking University Health Science Centre, Peking University, Beijing, China

Yan-Ling Wang

Affiliation Center for Evidence Based Medicine, Peking University Health Science Centre, Peking University, Beijing, China

Wei-Zhong Wang

Affiliation Institute of Pathogen Biology, The Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China

Li Yang

Affiliation School of Public Health, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, China

Xiao-hui Ouyang

Affiliation Inner Mongolia Medical College, Hohhot, Inner Mongolia, China

Guang-cai Duan

Affiliation Henan University of Science and Technology, Luoyang, Henan Province, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JLT XML YHH LML. Performed the experiments: XML JLT YHH LML YLW WZW LY XHO GCD. Analyzed the data: XML JLT. Contributed reagents/materials/analysis tools: XML JLT YLW WZW LY XHO GCD. Wrote the paper: JLT XML.