Wide variations in surgical mortality.
Mortensen
N
N
D003625:Data Collection; D006761:Hospitals / Q000592:standards; D006801:Humans; D011182:Postoperative Care / Q000592:standards*; D011183:Postoperative Complications / Q000401:mortality*; D011787:Quality of Health Care; D012307:Risk Factors; D013223:Statistics as Topic; D013997:Time Factors