title: New strains of bacteria and exacerbations of COPD.
authors.forename: Jan V
authors.initials: JV
authors.lastname: Hirschmann
mesh_terms: D001419:Bacteria / Q000145:classification* / Q000302:isolation & purification; D006801:Humans; D029424:Pulmonary Disease, Chronic Obstructive / Q000382:microbiology*; D013183:Sputum / Q000382:microbiology