RT Journal Article SR Electronic T1 Moral Principles and Political Obligations JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 211 OP 211 DO 10.1136/jme.8.4.211 VO 8 IS 4 A1 Kenneth M Boyd YR 1982 UL http://jme.bmj.com/content/8/4/211.1.abstract AB