TY - JOUR T1 - Threshold JF - Canadian Medical Association Journal JO - CMAJ SP - 272 LP - 272 DO - 10.1503/cmaj.121197 VL - 185 IS - 3 AU - David Rosen Y1 - 2013/02/19 UR - http://www.cmaj.ca/content/185/3/272.abstract N2 - ER -