About the Authors

Zhijie Zhang

Contributed equally to this work with: Zhijie Zhang, Wenbao Liu

chendm@queensu.ca (DC); epistat@gmail.com (ZZ)

Affiliations Department of Geography, Queen's University, Kingston, Canada, Department of Epidemiology, Fudan University, Shanghai, People's Republic of China

Dongmei Chen

chendm@queensu.ca (DC); epistat@gmail.com (ZZ)

Affiliation Department of Geography, Queen's University, Kingston, Canada

Yue Chen

Affiliation Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa, Canada

Wenbao Liu

Contributed equally to this work with: Zhijie Zhang, Wenbao Liu

Affiliation Department of Geography, Queen's University, Kingston, Canada

Lei Wang

Affiliation Department of Geography, Queen's University, Kingston, Canada

Fei Zhao

Affiliation Department of Epidemiology, Fudan University, Shanghai, People's Republic of China

Baodong Yao

Affiliation Department of Epidemiology, Fudan University, Shanghai, People's Republic of China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ZZ. Performed the experiments: ZZ. Analyzed the data: ZZ. Contributed reagents/materials/analysis tools: ZZ DC YC WL LW FZ BY. Wrote the paper: ZZ DC YC WL LW FZ BY.