Long term anticoagulation or antiplatelet treatment. Garbage in equals garbage out.
Peterson
G
G
Jackson
S
S
D000368:Aged; D001281:Atrial Fibrillation / Q000188:drug therapy; D006801:Humans; D015201:Meta-Analysis as Topic; D012107:Research Design; D013223:Statistics as Topic; D020521:Stroke / Q000517:prevention & control*