Test the primary/specialty care hypothesis.
Frey
John J
JJ
D005102:Health Expenditures; D006801:Humans; D006278:Medicare / Q000191:economics*; D010820:Physicians / Q000191:economics* / Q000600:supply & distribution*; D011785:Quality Assurance, Health Care / Q000191:economics*; D011787:Quality of Health Care