Cefazolin vs penicillin.
D002437:Cefazolin / Q000494:pharmacology / Q000627:therapeutic use*; D006801:Humans; D009177:Mycoplasma pneumoniae / Q000187:drug effects; D010402:Penicillin G Procaine / Q000494:pharmacology / Q000627:therapeutic use*; D011014:Pneumonia / Q000188:drug therapy*
D010402:Penicillin G Procaine; D002437:Cefazolin