Erythromycin and clindamycin.
D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D001991:Bronchitis / Q000188:drug therapy*; D002908:Chronic Disease; D004917:Erythromycin / Q000627:therapeutic use*; D006801:Humans
D000900:Anti-Bacterial Agents; D004917:Erythromycin