1. Laboratory for Zoonoses and Environmental Microbiology, Centre for Infectious Disease Control Netherlands, National Institute for Public Health and the Environment, Bilthoven, The Netherlands.
2. Division of Veterinary Public Health, Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands.
3. Applications of Decision Theory, Department of Applied Mathematics and Risk Analysis, Delft University of Technology, Delft, the Netherlands.
4. Current address: PricewaterhouseCoopers Advisory, Amsterdam, The Netherlands.
5. Chauncey Starr Chair for Risk Analysis, Resources for the Future, Washington, DC.