Physician assistant concept takes off.
D000574:American Medical Association; D006123:Group Practice / Q000191:economics / Q000458:organization & administration*; D017408:Guidelines as Topic; D009922:Oregon; D017060:Patient Satisfaction; D010823:Physician Assistants / Q000706:statistics & numerical data*; D011320:Primary Health Care / Q000191:economics; D014481:United States; D000078329:Workforce