RT Journal Article SR Electronic T1 Interaction between clopidogrel and proton pump inhibitors JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1228 OP 1228 DO 10.1503/cmaj.1090014 VO 180 IS 12 A1 Mark H. Friesen YR 2009 UL http://www.cmaj.ca/content/180/12/1228.1.abstract