title: The ER, 50 years on.
authors.affiliation: RAND Corporation, Santa Monica, CA, USA.
authors.forename: Arthur L
authors.initials: AL
authors.lastname: Kellermann
authors.forename: Ricardo
authors.initials: R
authors.lastname: Martinez
mesh_terms: D003237:Connecticut; D004636:Emergency Service, Hospital / Q000266:history / Q000706:statistics & numerical data / Q000639:trends*; D049673:History, 20th Century; D014481:United States