RT Journal Article SR Electronic T1 Biliary ascariasis and trisomy 21 in a child newly arrived to Canada JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1318 OP E1321 DO 10.1503/cmaj.220089 VO 194 IS 38 A1 Canes, Mitchell A1 Seaton, Claire A1 Mawson, John A1 Goldfarb, David M. A1 Kang, Kristopher T. YR 2022 UL http://www.cmaj.ca/content/194/38/E1318.abstract