RT Journal Article SR Electronic T1 Superiority trials, non-inferiority trials, and prisoners of the 2-sided null hypothesis JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 38 OP 39 DO 10.1136/ebm.9.2.38 VO 9 IS 2 A1 Sackett, David L YR 2004 UL http://ebm.bmj.com/content/9/2/38.abstract AB