RT Journal Article SR Electronic T1 The best type of trial JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1772 OP 1772-a DO 10.1503/cmaj.1040320 VO 170 IS 12 A1 J.A. Chris Delaney YR 2004 UL http://www.cmaj.ca/content/170/12/1772.2.abstract