RT Journal Article SR Electronic T1 Clostridium difficile colitis: A marker for ischemic colitis? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1325 OP 1326 DO 10.1503/cmaj.1041677 VO 171 IS 11 A1 Richard Fiddian-Green YR 2004 UL http://www.cmaj.ca/content/171/11/1325.2.abstract