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 SP E47 OP E57 DO 10.1503/cmaj.090523 VO 180 IS 10 A1 Kevin E. Thorpe A1 Merrick Zwarenstein A1 Andrew D. Oxman A1 Shaun Treweek A1 Curt D. Furberg A1 Douglas G. Altman A1 Sean Tunis A1 Eduardo Bergel A1 Ian Harvey A1 David J. Magid A1 Kalipso Chalkidou YR 2009 UL http://www.cmaj.ca/content/180/10/E47.abstract AB