Orkand Study update.
D000553:Ambulatory Care / Q000191:economics / Q000331:legislation & jurisprudence; D001130:Arizona; D007348:Insurance, Health / Q000331:legislation & jurisprudence*; D007349:Insurance, Health, Reimbursement / Q000331:legislation & jurisprudence*; D006278:Medicare / Q000331:legislation & jurisprudence; D013531:Surgicenters / Q000191:economics / Q000331:legislation & jurisprudence*; D014481:United States; D014483:United States Dept. of Health and Human Services