RT Journal Article SR Electronic T1 Radiation-dose knowledge needs improving JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E181 OP E181 DO 10.1503/cmaj.109-4996 VO 187 IS 6 A1 Tim Lougheed YR 2015 UL http://www.cmaj.ca/content/187/6/E181.abstract