The three-legged stool and the doctor's pen.
Crown
Loren
L
D017048:Health Care Costs; D018166:Health Care Reform; D006801:Humans; D019458:Insurance Coverage / Q000191:economics / Q000706:statistics & numerical data*; D007348:Insurance, Health / Q000191:economics; D006278:Medicare / Q000191:economics; D011787:Quality of Health Care; D014481:United States