RT Journal Article SR Electronic T1 Radiological and functional changes over 3 years in young children with cystic fibrosis JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society DO 10.1183/09031936.00051406 A1 S.W.J. Terheggen-Lagro A1 H.G.M. Arets A1 J. van der Laag A1 C.K. van der Ent YR 2007 UL http://erj.ersjournals.com/content/early/2007/04/25/09031936.00051406.abstract AB