1. Department of Epidemiology, School of Public Health, Cheeloo College of Medicine Shandong University Jinan China
2. State Key Laboratory of Pathogen and Biosecurity Beijing Institute of Microbiology and Epidemiology Beijing China
3. Department of Biostatistics, College of Public Health and Health Professions University of Florida Gainesville Florida USA
4. Emerging Pathogens Institute University of Florida Gainesville Florida USA
5. Department of Medical Research, Key Laboratory of Environmental Sense Organ Stress and Health of the Ministry of Environmental Protection PLA Strategic Support Force Medical Center Beijing China
6. Department of Epidemiology, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health Air Force Medical University Xi'an China
7. Department of Epidemiology Logistics College of Chinese People's Armed Police Forces Tianjin China