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New evidence of risk factors for community-acquired pneumonia: a population-based study
J. Almirall, I. Bolíbar, M. Serra-Prat, J. Roig, I. Hospital, E. Carandell, M. Agustí, P. Ayuso, A. Estela, A. Torres, the Community-Acquired Pneumonia in Catalan Countries (PACAP) Study Group
European Respiratory Journal 31 (6) 1274-1284; DOI: 10.1183/09031936.00095807 Published 30 May 2008