Frailty and functional outcomes in patients with progressive fibrosing interstitial lung diseases receiving antifibrotic therapy: a real-life observational study. - Mariniello DF; Perrotta F; Picone C; Liakouli V; Zamparelli SS; Stella GM; Reginelli A; Rea G; Bianco A; D'Agnano V (Frontiers in medicine, 2026)