title: Advances in epidural analgesia in labor.
authors.forename: R
authors.initials: R
authors.lastname: Collis
mesh_terms: D015360:Analgesia, Epidural / Q000379:methods; D016362:Analgesia, Obstetrical / Q000379:methods; D016058:Analgesia, Patient-Controlled; D000775:Anesthesia, Spinal; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D009294:Narcotics; D011247:Pregnancy
chemical_list: D009294:Narcotics