1. State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, Hubei, China
2. Department of Infectious Diseases, University of Georgia College of Veterinary Medicine, Athens, Georgia, USA
3. Graduate Program in Pathobiology, Pennsylvania State University, University Park, Pennsylvania, USA
4. National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
5. Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, Pennsylvania, USA
6. Intercollege Graduate Program in Genetics, Pennsylvania State University, University Park, Pennsylvania, USA