Editorial: Nitrous-oxide analgesia.
D000698:Analgesia; D000769:Anesthesia, Inhalation / Q000592:standards; D006328:Cardiac Catheterization; D004341:Drug Evaluation; D005260:Female; D006321:Heart / Q000187:drug effects; D006801:Humans; D009609:Nitrous Oxide / Q000008:administration & dosage / Q000494:pharmacology; D010100:Oxygen / Q000008:administration & dosage; D011247:Pregnancy
D009609:Nitrous Oxide; D010100:Oxygen