title: Implications of regional differences in spending.
authors.forename: Franklin
authors.initials: F
authors.lastname: Gaylis
mesh_terms: D019983:Guideline Adherence; D005102:Health Expenditures; D006278:Medicare / Q000191:economics*; D017410:Practice Guidelines as Topic; D010818:Practice Patterns, Physicians' / Q000191:economics; D014481:United States