RT Journal Article SR Electronic T1 Ethics of preventive medicine. JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 49 OP 49 DO 10.1136/jme.18.1.49-a VO 18 IS 1 A1 A Renton YR 1992 UL http://jme.bmj.com/content/18/1/49.2.abstract AB