RT Journal Article SR Electronic T1 Empirical treatment of nonsevere community-acquired pneumonia: still a difficult issue JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1996 OP 1998 DO 10.1183/09031936.95.08121996 VO 8 IS 12 A1 A Torres A1 V Ausina YR 1995 UL http://erj.ersjournals.com/content/8/12/1996.abstract AB