Practice strategies. Regional variations.
D006801:Humans; D007349:Insurance, Health, Reimbursement / Q000191:economics / Q000706:statistics & numerical data*; D008329:Managed Care Programs / Q000191:economics / Q000706:statistics & numerical data*; D009907:Optometry / Q000191:economics / Q000706:statistics & numerical data*; D017410:Practice Guidelines as Topic; D011364:Professional Practice / Q000191:economics / Q000706:statistics & numerical data*; D014481:United States