Institution: | (1) Department of Gastroenterology, Hvidovre University Hospital, 2650 Hvidovre, DK, Denmark;(2) Department of Bacteriology, Mycology and Parasitology, Statens Serum Institut, 2300 Copenhagen S, DK, Denmark;(3) Department of Gastroenterology, Herlev University Hospital, 2730 Herlev, DK, Denmark |