RT Journal Article SR Electronic T1 Uneven accessibility to biomarker test for lung cancer JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1203 OP 1203 DO 10.1503/cmaj.109-4577 VO 185 IS 14 A1 Lougheed, Tim YR 2013 UL http://www.cmaj.ca/content/185/14/1203.abstract