PT - JOURNAL ARTICLE ED - , TI - Abstracts AID - 10.1136/jech.5.1.64 DP - 1951 Jan 01 TA - British Journal of Social Medicine PG - 64--72 VI - 5 IP - 1 4099 - http://jech.bmj.com/content/5/1/64.short 4100 - http://jech.bmj.com/content/5/1/64.full SO - Br J Soc Med1951 Jan 01; 5