1. Department of Occupational and Environmental Health Science, School of Public Health, Peking University, Beijing, People’s Republic of China
2. Xiamen Municipal Health Bureau, Xiamen, Fujian Province, People’s Republic of China
3. Division of Environmental Pollution and Health, Chinese Research Academy of Environmental Sciences, Beijing, People’s Republic of China
4. Quanzhou Municipal Health Inspection Station
5. Quanzhou Municipal Health Bureau and
6. Licheng District Center for Disease Control and Prevention, Quanzhou, Fujian Province, People’s Republic of China