RT Journal Article SR Electronic T1 Clinical COPD phenotypes: a novel approach using principal component and cluster analyses JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society DO 10.1183/09031936.00175109 A1 P-R. Burgel A1 J-L. Paillasseur A1 D. Caillaud A1 I. Tillie-Leblond A1 P. Chanez A1 R. Escamilla A1 I. Court-Fortune A1 T. Perez A1 P. Carré A1 N. Roche A1 on behalf of the Initiatives BPCO Scientific Committee YR 2010 UL http://erj.ersjournals.com/content/early/2010/01/14/09031936.00175109.abstract AB