RT Journal Article SR Electronic T1 What happens when laboratory reference ranges change? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E481 OP E482 DO 10.1503/cmaj.200511 VO 192 IS 18 A1 Topliss, Duncan J. YR 2020 UL http://www.cmaj.ca/content/192/18/E481.abstract AB