RT Journal Article SR Electronic T1 Proton pump inhibitors and the risk of Clostridium difficile-associated disease: further evidence from the community JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 757 OP 757 DO 10.1503/cmaj.060919 VO 175 IS 7 A1 Cunningham, Richard YR 2006 UL http://www.cmaj.ca/content/175/7/757.abstract