1. Institute of EcoHealth, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
2. Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
3. Department of Occupational Health and Occupational Medicine, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
4. State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China