title: Amniotic fluid embolism: active surveillance versus retrospective database review.
authors.forename: Marian
authors.initials: M
authors.lastname: Knight
mesh_terms: D000328:Adult; D004619:Embolism, Amniotic Fluid / Q000453:epidemiology*; D005260:Female; D006801:Humans; D015994:Incidence; D011159:Population Surveillance; D011247:Pregnancy; D011446:Prospective Studies; D012042:Registries; D012189:Retrospective Studies; D006113:United Kingdom / Q000453:epidemiology; D014481:United States / Q000453:epidemiology