RT Journal Article SR Electronic T1 The ethics of xenotransplantation. JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 414 OP 415 DO 10.1136/jme.24.6.414-a VO 24 IS 6 A1 R Bartlett YR 1998 UL http://jme.bmj.com/content/24/6/414.2.abstract AB