1. Department of Medical Microbiology
Reference laboratory for Clostridium difficile
Center of Infectious Diseases
Leiden University Medical Center
PO Box 9600
NL-2300 RC Leiden, The Netherlands
2. Department of Medical Microbiology
Meander Medical Centre
PO Box 1502
NL-3800 BM Amersfoort, The Netherlands
3. Utrecht University
Faculty of Veterinary Medicine
Department of Farm Animal Health
Internal Medicine Division
PO Box 80.151
NL-3508 TD Utrecht, The Netherlands
4. Centre for Infectious Disease Control
National Institute for Public Health and the Environment (RIVM)
Bilthoven, The Netherlands
5. Utrecht University
Institute for Risk Assessment Sciences
Veterinary Public Health Division
PO Box 80.175
NL-3508 TD Utrecht, The Netherlands