Departmental evolution of obstetric anesthesia. A 12-year survey.
D000773:Anesthesia, Obstetrical / Q000266:history*; D005260:Female; D049673:History, 20th Century; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008428:Maternal Mortality; D014481:United States