Practical aspects of relative analgesia.
D000328:Adult; D000766:Anesthesia, Dental / Q000379:methods*; D000769:Anesthesia, Inhalation / Q000379:methods*; D000772:Anesthesia, Local / Q000379:methods; D002648:Child; D002675:Child, Preschool; D006801:Humans; D009609:Nitrous Oxide / Q000008:administration & dosage*
D009609:Nitrous Oxide