title: Geographic analysis: need for better data.
authors.forename: Thomas C
authors.initials: TC
authors.lastname: Ricketts
authors.forename: G Mark
authors.initials: GM
authors.lastname: Holmes
mesh_terms: D005102:Health Expenditures; D006801:Humans; D006278:Medicare / Q000191:economics*; D010820:Physicians / Q000600:supply & distribution*; D011787:Quality of Health Care