<qa>  What will the primary outcome be defined as a hospitalization or emergency department visit within 3 monthsExposure to a DOAC will be defined as a new prescription for a DOAC on the date of cohort entry. Exposure to warfarin will be defined as a new prescription for warfarin on the date of cohort entry. The investigators will use an analysis analogous to an intention-to-treat approach. The primary outcome will be defined as a hospitalization or emergency department visit for a major bleed within 3 months of cohort entry. 