warfarin warfarin heart.org Patient's Guide to Taking Warfarin warfarin warfarin warfarin warfarin according to the American Heart Association A Patient's Guide to Taking Warfarin Warfarin A patient`s guide to taking warfarin anticoagulant therapy (Warfarin) American Heart Association warfarin Warfarin Warfarin Warfarin using warfarin. Warfarin warfarin Warfarin warfarin Warfarin tested daily warfarin warfarin