TY - JOUR T1 - The Cochrane Collaboration 20 years in JF - Canadian Medical Association Journal JO - CMAJ DO - 10.1503/cmaj.131251 SP - cmaj.131251 AU - Jeremy Grimshaw AU - Jonathan Craig AU - David Tovey AU - Mark Wilson Y1 - 2013/01/01 UR - http://www.cmaj.ca/content/early/2013/08/26/cmaj.131251.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -