puits (1) stratification (1) sécurité (1) évaluation du risque (1) risque (1) protocole (1) éthique (1) accident (1) comparaison (1) adulte (1) procès (1) taux (1) Helsinki (1) Surgery (1) Comparison (1) Treatment (1) Control (1) Congresses (1) Risk assessment (1) Protection (1) Will (1) Trials (1) Thrombosis (1) Thromboembolism (1) Surgery (1) Strategy (1) Risk (1) Plaster casts (1) Patients (1) Orthopedics (1)