1. Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, P.R. China
2. Zhongda Hospital, Nanjing, Jiangsu, P.R. China.
3. Department of Environmental Occupational Health, Taizhou Center for Disease Control and Prevention, Taizhou City, Jiangsu, P.R. China.