State society testifies on market dominance.
D006282:Health Personnel / Q000331:legislation & jurisprudence; D006801:Humans; D007348:Insurance, Health / Q000331:legislation & jurisprudence*; D008389:Marketing of Health Services / Q000331:legislation & jurisprudence*; D020403:Patient Freedom of Choice Laws; D010414:Pennsylvania; D012955:Societies, Medical / Q000331:legislation & jurisprudence*; D013219:State Government