title: 1999 200-city survey. EMS trends in America's most populous cities.
authors.forename: T
authors.initials: T
authors.lastname: Mayfield
authors.forename: A M
authors.initials: AM
authors.lastname: Lindstrom
mesh_terms: D004632:Emergency Medical Services / Q000706:statistics & numerical data*; D006801:Humans; D011159:Population Surveillance; D014481:United States; D014505:Urban Population