The physician as an entrepreneur.
D002309:Cardiology / Q000191:economics; D004465:Economic Competition; D006123:Group Practice / Q000458:organization & administration*; D006777:Hospitals, Proprietary / Q000191:economics; D006801:Humans; D007325:Institutional Practice / Q000191:economics; D009518:New York; D011216:Practice Management, Medical / Q000639:trends*; D014481:United States