TY - JOUR T1 - To test or not to test JF - Canadian Medical Association Journal JO - CMAJ SP - 1238 LP - 1238 VL - 161 IS - 10 AU - David C. Mendelssohn Y1 - 1999/11/16 UR - http://www.cmaj.ca/content/161/10/1238.1.abstract ER -