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Immortal time bias in pharmacoepidemiological studies on cancer patient survival: empirical illustration for beta-blocker use in four cancers with different prognosis

Chemoprevention StrategyMedicineLongevityCancer ManagementPharmacologyEpidemiology Of CancerDifferent PrognosisPharmacotherapyCancer Patient SurvivalCancer TreatmentImmortal Time BiasOncologyCancer Research