About the Authors

Jinhui Li

Contributed equally to this work with: Jinhui Li, Qingyuan Huang

Affiliations Department of Preventive Medicine, School of Public Health, Sun Yat-sen University, Guangzhou, P.R. China, Department of Toxicology, Guangzhou Center for Disease Control and Prevention, Guangzhou, P.R. China

Qingyuan Huang

Contributed equally to this work with: Jinhui Li, Qingyuan Huang

Affiliation Department of Thoracic Oncology, State Key Laboratory of Oncology in South China, Sun Yat-sen University Cancer Center, Guangzhou, P.R. China

Fangfang Zeng

Affiliations Department of Epidemiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, P.R. China, Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Medical Statistics & Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, P.R. China

Wenxue Li

Affiliation Department of Toxicology, Guangzhou Center for Disease Control and Prevention, Guangzhou, P.R. China

Zhini He

Affiliation Department of Preventive Medicine, School of Public Health, Sun Yat-sen University, Guangzhou, P.R. China

Wen Chen

Affiliation Department of Preventive Medicine, School of Public Health, Sun Yat-sen University, Guangzhou, P.R. China

Wei Zhu

zhuyc126@126.com (WZ); zhangb65@mail.sysu.edu.cn (BZ)

Affiliation Department of Toxicology, Guangzhou Center for Disease Control and Prevention, Guangzhou, P.R. China

Bo Zhang

zhuyc126@126.com (WZ); zhangb65@mail.sysu.edu.cn (BZ)

Affiliation Department of Preventive Medicine, School of Public Health, Sun Yat-sen University, Guangzhou, P.R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: BZ WZ. Performed the experiments: JL QH. Analyzed the data: JL QH. Contributed reagents/materials/analysis tools: ZH WL. Wrote the paper: JL. Gave advice on meta-analysis methodology: FZ. Extensively reviewed and edited the manuscript: WC WZ BZ.