1. Department of Surgical Gastroenterology, Bispebjerg Hospital, Copenhagen, Denmark
2. Department of Infectious Diseases, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
3. Department of Pathology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
4. Centre for Medical Parasitology, Department of Clinical Microbiology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
5. Department of Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark