How not to grade hospital safety.
D000368:Aged; D017052:Hospital Mortality; D006761:Hospitals / Q000592:standards*; D006801:Humans; D019300:Medical Errors / Q000517:prevention & control / Q000706:statistics & numerical data; D006278:Medicare; D019984:Quality Indicators, Health Care; D011787:Quality of Health Care; D014481:United States / Q000453:epidemiology