title: How to... clarification.
authors.forename: Mandy
authors.initials: M
authors.lastname: Forrester
mesh_terms: D019162:Anesthetics, Combined / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D048949:Labor Pain / Q000188:drug therapy*; D009609:Nitrous Oxide / Q000008:administration & dosage*; D009721:Nurse Midwives; D010100:Oxygen / Q000008:administration & dosage*; D011247:Pregnancy
chemical_list: D019162:Anesthetics, Combined; C001147:Entonox; D009609:Nitrous Oxide; D010100:Oxygen