RT Journal Article SR Electronic T1 Canadian Blood Services to screen for Chagas disease JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 242 OP 242-a DO 10.1503/cmaj.070882 VO 177 IS 3 A1 Pauline Comeau YR 2007 UL http://www.cmaj.ca/content/177/3/242.2.abstract