RT Journal Article SR Electronic T1 The Human Use of Animals: Case Studies in Ethical Choice JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 422 OP 422 DO 10.1136/jme.25.5.422 VO 25 IS 5 A1 T L S Sprigge YR 1999 UL http://jme.bmj.com/content/25/5/422.1.abstract AB