CFTR and cystic fibrosis: Of the 1279 screened patients for CFTR, 71 (5.6%) were diagnosed as a carrier of one CFTR mutation, 1 patient that was asymptomatic for CF was homozygous for D1270N, 1 patient was heterozygote compound (G542X;F1052V, asymptomatic patient), 1 patient was a carrier of F508del/N-TG12;5 T, 1 patient was a carrier of F1052V/N-TG12;5 T and 5 patients were carriers of pathogenic complex alleles.