RT Journal Article SR Electronic T1 Why we can't really say what post-persons are JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 144 OP 145 DO 10.1136/medethics-2011-100239 VO 38 IS 3 A1 Nicholas Agar YR 2012 UL http://jme.bmj.com/content/38/3/144.abstract AB