title: Letter: Nitrous-oxide asphyxia.
mesh_terms: D000769:Anesthesia, Inhalation / Q000009:adverse effects* / Q000295:instrumentation; D001237:Asphyxia / Q000139:chemically induced; D006801:Humans; D009609:Nitrous Oxide / Q000009:adverse effects*; D013523:Surgical Equipment / Q000592:standards
chemical_list: D009609:Nitrous Oxide