Association of depressive symptoms with sweat chloride variability and medication possession ratio during long-term Elexacaftor/Tezacaftor/Ivacaftor therapy in adolescents and young adults with cystic fibrosis - Michael Lorenz; Mariya Pavlova; Katja Erler; Anika Nader; Anne Moeser (Frontiers in Pediatrics, 2026)