RT Journal Article SR Electronic T1 The search for meaningful comparisons in boxing and medical ethics JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 514 OP 515 DO 10.1136/jme.2003.003533 VO 30 IS 5 A1 C D Herrera YR 2004 UL http://jme.bmj.com/content/30/5/514.abstract AB