1. School of Public Health North China University of Science and Technology Tangshan China
2. Department of Preventive Health The Third People’s Hospital of Xiangcheng District in Suzhou Suzhou China
3. Department of Pediatrics North China University of Science and Technology Affiliated Hospital Tangshan China
4. Department of Neurology Tangshan Gongren Hospital Tangshan China
5. Department of Emergency Tangshan Hospital of Traditional Chinese Medicine Tangshan China
6. Department of Respiratory Medicine Tangshan People's Hospital Tangshan China