Lung clearance index short-term variability in cystic fibrosis: a pre-post pulmonary exacerbation study.

"Declarations Ethics approval and consent to participateLocal ethics committees of Bambino Gesù Children’s Hospital approved the study (n° 2819_OPBG_2022). Parental consent was not required because this is a retrospective study and data were anonymized. Written infomed consents were obtained by parents of patients (all under the age of 16). All methods of this study were carried out in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. Consent for publicationWritten informed consents for publication of the data in an anonymous and aggregated form were obtained. Competing interestsThe authors declare that they have no competing interests. Competing interests The authors declare that they have no competing interests."

"Funding This work was supported also by the Italian Ministry of Health with current research funds."