About the Authors
Institute of Disease Control and Prevention, Academy of Military Medical Science, Beijing, People′s Republic of China
Chinese Center for Disease Control and Prevention, Beijing, People′s Republic of China
School of Population Health, Infectious Disease Epidemiology Unit, The University of Queensland, Brisbane, Australia
Discipline of Public Health, University of Adelaide, Adelaide, Australia
The authors have declared that no competing interests exist.
Conceived and designed the experiments: WYZ WBH RJSM ACAC PB CYL. Performed the experiments: LYW WYZ WBH HLS SLL. Analyzed the data: LYW WYZ WBH HLS SLL. Contributed reagents/materials/analysis tools: FD YXL WZ YW QYL WWY LYH. Wrote the paper: LYW WYZ RJSM ACAC PB CYL.