title: A terrible headache in obstetric anesthesia.
authors.forename: Pamela
authors.initials: P
authors.lastname: Flood
authors.forename: Guohua
authors.initials: G
authors.lastname: Li
mesh_terms: D016208:Databases, Factual; D005260:Female; D006760:Hospitalization; D006801:Humans; D058725:Peripartum Period; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular / Q000453:epidemiology*; D013345:Subarachnoid Hemorrhage / Q000453:epidemiology*