title: Practice variation: the Achilles' heel in quality cancer care.
authors.forename: David M
authors.initials: DM
authors.lastname: Dilts
mesh_terms: D019317:Evidence-Based Medicine; D019983:Guideline Adherence; D006801:Humans; D008495:Medical Oncology / Q000592:standards*; D017410:Practice Guidelines as Topic; D010818:Practice Patterns, Physicians' / Q000706:statistics & numerical data*; D011785:Quality Assurance, Health Care