title: Practice patterns in the U.S.
authors.forename: James I
authors.initials: JI
authors.lastname: Ausman
mesh_terms: D001130:Arizona; D002641:Chicago; D006123:Group Practice / Q000458:organization & administration*; D006801:Humans; D009493:Neurosurgery / Q000458:organization & administration*; D009820:Ohio; D011216:Practice Management, Medical / Q000706:statistics & numerical data*; D014481:United States