RT Journal Article SR Electronic T1 Matrix metalloproteinase expression and abnormal lung permeability are important determinants of outcome in IPF JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society DO 10.1183/09031936.00060708 A1 S. McKeown A1 A.G. Richter A1 C. O'Kane A1 D.F. McAuley A1 D.R. Thickett YR 2008 UL http://erj.ersjournals.com/content/early/2008/10/01/09031936.00060708.abstract AB