RT Journal Article SR Electronic T1 Intention-to-treat and per-protocol analysis JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 696 OP 696 DO 10.1503/cmaj.111-2033 VO 183 IS 6 A1 Shah, Pankaj B. YR 2011 UL http://www.cmaj.ca/content/183/6/696.1.abstract