PT - JOURNAL ARTICLE AU - P J McGrath TI - Analysis: an introduction to ethical concepts. 'Is' and 'ought'. AID - 10.1136/jme.1.3.150 DP - 1975 Sep 01 TA - Journal of Medical Ethics PG - 150--151 VI - 1 IP - 3 4099 - http://jme.bmj.com/content/1/3/150.short 4100 - http://jme.bmj.com/content/1/3/150.full SO - J Med Ethics1975 Sep 01; 1