temps (durée) (1) sécurité (1) risque (1) substitution (1) association (1) mortalité (1) modèle (1) danger (1) fruit (1) effet (1) comparaison (1) Mortality (1) Development (1) Surgery (1) Comparison (1) Treatment (1) Methods (1) Ci (Chinese poetry) (1) Trials (1) Time (1) Surgery (1) Social groups (1) Risk (1) Proportion (1) Process (Law) (1) Percentage (1) Patients (1) Mortality (1) Months (1) Meta-analysis (1)