1. Department of Medical Microbiology, Beatrix Hospital and Albert Schweitzer Hospital, P.O. Box 899, 3300 AW Dordrecht, The Netherlands
2. Department of Surgery, Beatrix Hospital, P.O. Box 90, 4200 AB Gorinchem, The Netherlands
3. Division for CBRN Defence and Security, FOI—Swedish Defence Research Agency, Umeå, Sweden
4. Department of Earth, Environmental, and Life Sciences, TNO, P.O. Box 45, 2280 AA Rijswijk, The Netherlands
5. Public Health Service Zuid-Holland Zuid, P.O. Box 166, 3300 AD Dordrecht, The Netherlands
6. Diagnostic Laboratory for Infectious Diseases and Perinatal Screening (LIS), Center for Infectious Disease Control, National Institute of Public Health and the Environment (RIVM), P.O. Box 1, 3720 BA Bilthoven, The Netherlands