title: Exploring variation in care: alternative conceptual models.
authors.forename: Michaela A
authors.initials: MA
authors.lastname: Dinan
authors.forename: Kevin A
authors.initials: KA
authors.lastname: Schulman
mesh_terms: D003952:Diagnostic Imaging / Q000706:statistics & numerical data*; D006300:Health Services Misuse; D006787:Hospitals, Veterans / Q000191:economics*; D006801:Humans; D008297:Male; D006278:Medicare / Q000191:economics*; D009369:Neoplasms / Q000175:diagnosis*