Kors (Cornelis K) van der Ent (1962) is paediatrician and Professor in Paediatric Pulmonology. After medical training in Rotterdam and Utrecht he graduated in 1997 on a thesis on clinical and physiological aspects of tidal breathing analysis as a measure for airway obstruction in young infants. At the same year he founded the Utrecht Cystic Fibrosis Center, being the largest in the country, focusing on multidisciplinary and long-term centralised treatment of patients with CF. Prof Van der Ent published over 250 national and international peer reviewed scientific papers and acted as promoter in 25 theses. Currently he supervises 3 post-docs and 14 PhD students, all working on mechanisms in the development and treatment of cystic fibrosis and other bronchusobstructive diseases. He chairs the CF-subnetwork of the European Reference Network Lung (ERN-LUNG) and is the coordinator of the EU funded HIT-CF program, targeting personalised treatment in patients with ultra-rare CFTR genotypes in Europe.