RT Journal Article SR Electronic T1 Interstitial lung disease: are we missing formes frustes of connective tissue disease? JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 893 OP 896 DO 10.1183/09031936.00101506 VO 28 IS 5 A1 V. Cottin YR 2006 UL http://erj.ersjournals.com/content/28/5/893.abstract AB