Intestinal current measurements (ICM) as biomarker to evaluate the activation of mutant CFTR in subjects with cystic fibrosis aged 6 years and older, homozygous for the p.Phe508del-CFTR mutation or com-pound heterozygous for p.Phe508del-CFTR and a minimal function mutation, for whom the clinical indication is met for triple-CFTR-modulator therapy with elexacaftor in combination with tezacaftor and ivacaftor (brand name: Kaftrio®)
-A post-approval observational study-
