RT Journal Article SR Electronic T1 Effectiveness of the pneumococcal polysaccharide vaccine in Preventing Pneumonia in the elderly JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society DO 10.1183/09031936.00171309 A1 A. DomĂ­nguez A1 C. Izquierdo A1 L. Salleras A1 L. Ruiz A1 D. Sousa A1 J.M. Bayas A1 M. Nebot A1 W. Varona A1 J.M. Celorrio A1 J. CarratalĂ  A1 for the Working Group for the Study of Prevention of CAP in the Elderly YR 2010 UL http://erj.ersjournals.com/content/early/2010/01/14/09031936.00171309.abstract AB