RT Journal Article SR Electronic T1 When should I stop anticoagulation for atrial fibrillation? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1437 OP 1437 DO 10.1503/cmaj.1041026 VO 172 IS 11 A1 Michelle Greiver YR 2005 UL http://www.cmaj.ca/content/172/11/1437.1.abstract