School of Medicine;
University of Athens;
Department of Pediatrics;
Athens Medical Center;
Athens University Medical School;
Respiratory Unit;
Third Department of Pediatrics;
Athens University Medical School;
"Attikon" University Hospital;
Department of Cystic Fibrosis;
"Agia Sofia";
Children’s Hospital;
Cystic; fibrosis; Respiratory; health; Lung; clearance; index; Ventilation; inhomogeneity;