1. National Key Laboratory of Veterinary Public Health Security, Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases and Key Laboratory of Animal Epidemiology of Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, People’s Republic of China
2. State Key Laboratories of Agrobiotechnology, and Department of Microbiology and Immunology, College of Biological Science, China Agricultural University, Beijing, People’s Republic of China
3. Liaoning Agricultural Development Service Center, Shenyang, People’s Republic of China
4. Department of Epidemiology and Biostatistics, University of Georgia, Athens, GA, USA
5. Department of Mathematics, University of Florida, Gainesville, FL, USA
6. Center for Cell Analysis and Modeling, University of Connecticut School of Medicine, Farmington, CT, USA