RT Journal Article SR Electronic T1 Price of precaution of human-pig chimeras for transplantation purposes JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 447 OP 448 DO 10.1136/medethics-2019-105553 VO 45 IS 7 A1 Christian Munthe YR 2019 UL http://jme.bmj.com/content/45/7/447.abstract AB