1. School
of Public Health, Xinjiang Medical University, Urumqi 830011, China
2. Public
Health Laboratory Sciences and Toxicology, West China School of Public
Health, Sichuan University, Chengdu 610041, China
3. Key
Laboratory of Environment and Health among Universities and Colleges
in Fujian, School of Public Health, Fujian Medical University, Minhou
County, Fuzhou 350108, China