Yue-Lun Zhang
Division of Epidemiology, JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China
Shenzhen Municipal Key Laboratory for Health Risk Analysis, Shenzhen Research Institute of The Chinese University of Hong Kong, Shenzhen, Guangdong Province, China
Shi-Gui Yang
State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
Gang Li
Department of Epidemiology, Longgang Center for Disease Control and Prevention, Longgang District, Shenzhen, China
Jing Yuan
Department of Infectious Diseases, Shenzhen Third People's Hospital, Shenzhen, China
Hong Ding
Department of Quality Management and Health Education, Longgang Center for Disease Control and Prevention, Longgang District, Shenzhen, China
Chen Mao ⁎ 
Division of Epidemiology, JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China
Shenzhen Municipal Key Laboratory for Health Risk Analysis, Shenzhen Research Institute of The Chinese University of Hong Kong, Shenzhen, Guangdong Province, China
∗∗Corresponding author. Division of Epidemiology, School of Public Health and Primary Care, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China. Tel.: +852 22528810; fax: +852 26063500.Division of EpidemiologySchool of Public Health and Primary CareThe Chinese University of Hong KongShatinNew TerritoriesHong Kong, China
Qu Liu ⁎ 
Longgang Center for Disease Control and Prevention, Longgang District, Shenzhen, China
∗Corresponding author. Longgang Center for Disease Control and Prevention, Longgang District, Shenzhen, Guangdong, China. Tel.: +86 13802707059; fax: +86 0755 28932299.Longgang Center for Disease Control and PreventionLonggang DistrictShenzhenGuangdongChina
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