RT Journal Article SR Electronic T1 Stomach bug or COVID? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E590 OP E590 DO 10.1503/cmaj.1095996 VO 194 IS 16 A1 Vogel, Lauren A1 Duong, Diana YR 2022 UL http://www.cmaj.ca/content/194/16/E590.abstract