RT Journal Article SR Electronic T1 Number needed to treat and baseline risks JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1174 OP 1174 DO 10.1503/cmaj.1080110 VO 179 IS 11 A1 James P. McCormack, BSc(Pharm) PharmD YR 2008 UL http://www.cmaj.ca/content/179/11/1174.1.abstract