1. Department of Virology, Erasmus MC, 3015 GE Rotterdam, The Netherlands.
2. Canadian Cooperative Wildlife Health Centre, University of Saskatchewan, Saskatoon, SK, S7N 5B4, Canada.
3. National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
4. Department of Microbiology, University of Hong Kong, Hong Kong SAR, China.
5. World Organization for Animal Health (OIE), Paris, France.
6. World Health Organization, Department of Communicable Disease Surveillance and Response, Geneva, Switzerland.