CFTR and cystic fibrosis: We thank Dr. Jeffrey A. Whitsett, Cincinnati Children's Hospital Medical Center Cincinnati, USA for providing gut corrected CF mice (FABP-hCFTR-CFTR−/−), Dr. Gergely Lukacs and Dr Guido Veit, McGill University Montreal, Canada and Dr. Hugo de Jonge, Erasmus University Medical Center Rotterdam, The Netherlands for advice on CFTR immunoblotting, and Tomi Bähr-Ivacevic, EMBL Genomics Core Facility for expert technical assistance.