1. Animal Sciences Group, Division of Infectious Diseases (OIE Reference Laboratory for Campylobacteriosis), Lelystad, The Netherlands
2. Nuffield Department of Clinical Sciences, University of Oxford, Department of Microbiology, John Radcliffe Hospital, Oxford, United Kingdom
3. The Peter Medawar Building for Pathogen Research and Department of Zoology, University of Oxford, Oxford, United Kingdom
4. Veterinary Laboratories Agency, Weybridge, United Kingdom
5. Department of Infectious Diseases and Immunology (OIE Reference Laboratory for Campylobacteriosis), Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands