TY - JOUR T1 - Perils of systematic reviews JF - Canadian Medical Association Journal JO - CMAJ SP - 855 LP - 855 DO - 10.1503/cmaj.1041715 VL - 172 IS - 7 AU - Ariella Lang AU - Nancy Edwards Y1 - 2005/03/29 UR - http://www.cmaj.ca/content/172/7/855.1.abstract ER -