1. Department of Pathology, Bacteriology and Avian Diseases; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
2. The Marshall Centre for Infectious Diseases Research and Training; University of Western Australia; Perth WA Australia
3. Institute of Pharmaceutical Science; King's College London; London UK
4. The Maudsley Hospital; London UK
5. Department of Gastroenterology; King's College Hospital; London UK
6. Statistics Unit; Centre for Infectious Disease Surveillance and Control; Public Health England; London UK