Update on Pennsylvania's HC4 and the use of data in marketing hospital services.
D001026:Coronary Artery Bypass / Q000401:mortality / Q000592:standards* / Q000706:statistics & numerical data; D003625:Data Collection; D005069:Evaluation Studies as Topic; D006265:Health Care Coalitions; D017052:Hospital Mortality; D006761:Hospitals / Q000592:standards*; D006801:Humans; D008389:Marketing of Health Services; D010414:Pennsylvania; D010820:Physicians / Q000592:standards*; D011787:Quality of Health Care