title: Forty years of unwarranted variation--and still counting.
authors.affiliation: Peggy Y. Thomson Professor Emeritus in the Evaluative Clinical Sciences & Founder and Director Emeritus, The Dartmouth Institute for Health Policy and Clinical Practice, 35 Centerra Parkway, Suite 300, Lebanon, NH 03766, United States. Electronic address: John.E.Wennberg@Dartmouth.edu.
authors.forename: John E
authors.initials: JE
authors.lastname: Wennberg
mesh_terms: D003695:Delivery of Health Care / Q000592:standards / Q000706:statistics & numerical data; D006801:Humans; D010820:Physicians / Q000600:supply & distribution; D010818:Practice Patterns, Physicians' / Q000592:standards / Q000706:statistics & numerical data; D014481:United States; D014707:Vermont