Guangdong Province Hospital for Occupational Disease Prevention and Treatment;
Guangzhou 510300;
Guangdong;
China;
Guangdong Provincial Key Laboratory of Occupational Disease Prevention and Treatment;
Guangzhou 510300;
Guangdong;
China;
Guangodng Provincial Center for Diseases Control and Prevention;
Guangzhou 511430;
Guangdong;
China;
Department of Epidemiology;
School of Public Health;
Southern Medical University;
Guangzhou 510515;
Guangdong;
China;