1. Department of Applied Physics, Institute of Advanced Materials Physics, Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Faculty of Science, Tianjin University, Tianjin 300072, People’s Republic of China
2. School of Public Health, North China University of Science and Technology, Tangshan, Hebei 063000, People’s Republic of China
3. Department of Pathology, North China University of Science and Technology Affiliated Hospital, Tangshan, Hebei 063000, People’s Republic of China
4. Center of Environmental Monitoring of Tangshan, Tangshan, Hebei 063000, People’s Republic of China
5. Tangshan Environmental Monitoring Center of Heibei Province, Tangshan, Hebei 063000, People’s Republic of China