RT Journal Article SR Electronic T1 Clinical Trials JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 159 OP 159 DO 10.1136/jme.7.3.159 VO 7 IS 3 A1 D R Laurence YR 1981 UL http://jme.bmj.com/content/7/3/159.1.abstract AB