1. Guangdong Research Center of Occupational Hygiene, Guangdong Province Hospital for Occupational Disease Prevention and Treatment (GDHOD), Guangzhou 510399, China
2. School of Chemistry and Environment, Jiaying University, Meizhou 514015, China
3. Key Laboratory of Occupational Environment and Health, Guangzhou Occupational Disease Prevention and Treatment Hospital, Guangzhou 510620, China
4. School of Environment and Energy, South China University of Technology (SCUT), Guangzhou 510006, China