RT Journal Article SR Electronic T1 Gallstone ileus JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 203 OP 203 DO 10.1503/cmaj.080053 VO 179 IS 2 A1 Samarkos, Michael A1 Makrygianni, Virginia YR 2008 UL http://www.cmaj.ca/content/179/2/203.abstract