Department of Occupation Health and Toxicology;
School of Public Health;
Fudan University;
Shanghai 200000;
China;
Department of Occupation Health;
Shanghai Municipal Health Commission;
Shanghai 200000;
China;
Shanghai Institute of Occupational Disease for Chemical Industry(Shanghai Institute of Occupational Safety&Health);
Shanghai 200000;
China;
Division of Health Risk Factors Monitoring and Control;
Shanghai Municipal Center for Disease Control and Prevention;
Shanghai 200000;
China;
University of Medicine;
Pharmacy;
Science and Technology;
Targu Mures;
Romania and Shantou University Medical College;
Shantou 515000;
Guangdong;
China;
Benzene; Toluene; Xylene; Occupational health risk assessment; Exposure level method; Comprehensive index method;