CFTR CFTR CFTR cystic fibrosis transmembrane conductance regulator CFTR protein CFTR http://ghr.nlm.nih.gov/gene/CFTR CFTR CFTR gene CFTR CFTR CFTR CFTR CFTR gene CFTR CFTR CFTR CFTR CFTR CFTR cystic fibrosis transmembrane conductance regulator CFTR CFTR CFTR CFTR http://ghr.nlm.nih.gov/gene/CFTR CFTR CFTR CFTR CFTR CFTR protein CFTR CFTR CFTR CFTR CFTR CFTR CFTR CFTR CFTR CFTR CFTR CFTR CFTR CFTR CFTR CFTR CFTR CFTR CFTR CFTR CFTR http://ghr.nlm.nih.gov/gene/CFTR protein CFTR CFTR gene CFTR CFTR CFTR