RT Journal Article SR Electronic T1 Differentiating between human and non-human interspecies embryos JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 284 OP 285 DO 10.1136/medethics-2013-101363 VO 40 IS 4 A1 Calum MacKellar YR 2014 UL http://jme.bmj.com/content/40/4/284.abstract AB Following the debate in the UK House of Lords, in December 2012, uncertainty remains as to the manner in which human and non-human interspecies embryos are differentiated in law.