title: Staffing primary care in 1990--potential effects on staffing and costs: estimates from the model.
mesh_terms: D003362:Cost-Benefit Analysis; D008962:Models, Theoretical; D009722:Nurse Practitioners / Q000706:statistics & numerical data; D010823:Physician Assistants / Q000706:statistics & numerical data; D011320:Primary Health Care; D014481:United States; D000078329:Workforce