Department of Surgery, Haraldsplass Deaconess Hospital, Bergen N-5892, Norway
Department of Surgical Sciences, University of Bergen, Bergen 5021, Norway
Digestive Disease Institute, Cleveland Clinic,Cleveland, OH 44101, United States
Department of General Surgery, Cleveland Clinic, Cleveland, OH 44101, United States
Department of Internal Medicine, University of Bergen, Bergen 5021, Norway
Department of Pathology, Haukeland University Hospital, Bergen 5021, Norway
Department of Microbiology, Haukeland University Hospital, Bergen 5021, Norway
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