1. Department of Clinical Microbiology, Copenhagen University Hospital - Amager and Hvidovre, Hvidovre, Denmark
2. Department of Gastroenterology, Copenhagen University Hospital - Amager and Hvidovre, Hvidovre, Denmark
3. Chr. Hansen A/S, Human Health, Hoersholm, Denmark
4. Department of Clinical Microbiology, Copenhagen University Hospital, Herlev, Denmark
5. Department of Infectious Diseases, Copenhagen University Hospital - Amager and Hvidovre, Hvidovre, Denmark
6. Clinical Research Centre, Copenhagen University Hospital - Amager and Hvidovre, Copenhagen, Denmark
7. Institute of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
8. Department of Clinical Microbiology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark