作者单位:Department of Pulmonary Diseases, VU University Medical Centre, Amsterdam, Netherlands[1]Department of Paediatric Gastroenterology, VU University Medical Centre, PO Box 7057, 1007 MB[2]Department of Pulmonology, Academic Medical Centre, Amsterdam, Netherlands[3]Department of Gastroenterology and Hepatology, VU University Medical Centre, Amsterdam, Netherlands[4]