RT Journal Article SR Electronic T1 Biomarkers of infection for the differential diagnosis of pleural effusions JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society DO 10.1183/09031936.00197208 A1 Porcel, J.M. A1 Vives, M. A1 Cao, G. A1 Bielsa, S. A1 Ruiz-González, A. A1 Martínez-Iribarren, A. A1 Esquerda, A. YR 2009 UL http://erj.ersjournals.com/content/early/2009/06/18/09031936.00197208.abstract AB