title: Natural history of lower respiratory tract illness.
authors.forename: M
authors.initials: M
authors.lastname: Thomas
mesh_terms: D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D006801:Humans; D010818:Practice Patterns, Physicians'; D012141:Respiratory Tract Infections / Q000188:drug therapy* / Q000209:etiology
chemical_list: D000900:Anti-Bacterial Agents