title: How much oxygen? State of the art.
mesh_terms: D000769:Anesthesia, Inhalation / Q000379:methods*; D006801:Humans; D009609:Nitrous Oxide / Q000008:administration & dosage; D010100:Oxygen / Q000008:administration & dosage*
chemical_list: D009609:Nitrous Oxide; D010100:Oxygen