Mortality control charts: both components of POSSUM ratio require critical analysis.
Khoury
George A
GA
D004935:Esophageal Diseases / Q000601:surgery; D017052:Hospital Mortality; D006801:Humans; D012720:Severity of Illness Index; D013272:Stomach Diseases / Q000601:surgery; D013503:Surgery Department, Hospital / Q000592:standards