RT Journal Article SR Electronic T1 A pragmatic-explanatory continuum indicator summary (PRECIS): a tool to help trial designers JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association DO 10.1503/cmaj.090523 A1 Thorpe, Kevin E A1 Zwarenstein, Merrick A1 Oxman, Andrew D A1 Treweek, Shaun A1 Furberg, Curt D A1 Altman, Douglas G A1 Tunis, Sean A1 Bergel, Eduardo A1 Harvey, Ian A1 Magid, David J A1 Chalkidou, Kalipso YR 2009 UL http://www.cmaj.ca/content/early/2009/04/16/cmaj.090523.abstract AB