Letter: Obstetric anesthesia in New York City.
D000773:Anesthesia, Obstetrical / Q000592:standards*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000628:therapy; D009519:New York City; D007744:Obstetric Labor Complications / Q000628:therapy; D011247:Pregnancy