title: The variation phenomenon in 1994.
authors.forename: D
authors.initials: D
authors.lastname: Blumenthal
mesh_terms: D006784:Hospitals, Teaching / Q000706:statistics & numerical data*; D006801:Humans; D010359:Patient Readmission / Q000706:statistics & numerical data*; D010818:Practice Patterns, Physicians' / Q000706:statistics & numerical data*; D014481:United States