Author information:
(1)Department of Internal Medicine, University Hospitals Leuven, Herestraat 49, 
B-3000 Leuven, Belgium.
(2)Department of Infectious Diseases, University Hospitals Leuven, Herestraat 
49, B-3000 Leuven, Belgium.
(3)Department of Respiratory Division, University Hospitals Leuven, Herestraat 
49, B-3000 Leuven, Belgium.
(4)Department of Radiology, University Hospitals Leuven, Herestraat 49, B-3000 
Leuven, Belgium.
(5)Department of Gastroenterology, University Hospitals Leuven, Herestraat 49, 
B-3000 Leuven, Belgium.
(6)Department of Gastroenterology, University Hospitals Leuven, Herestraat 49, 
B-3000 Leuven, Belgium. Electronic address: Severine.Vermeire@uzleuven.be.