title: Setting a new standard for studies of geographic variation in hospital utilization rates.
authors.forename: Carol M
authors.initials: CM
authors.lastname: Ashton
authors.forename: Kenneth
authors.initials: K
authors.lastname: Pietz
mesh_terms: D000368:Aged; D002391:Catchment Area, Health / Q000706:statistics & numerical data*; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D008404:Massachusetts; D015995:Prevalence; D014600:Utilization Review / Q000379:methods*