RT Journal Article SR Electronic T1 SOCIETY FOR SOCIAL MEDICINE JF British Journal of Preventive & Social Medicine JO Br J Prev Soc Med FD BMJ Publishing Group Ltd SP 110 OP 110 DO 10.1136/jech.17.2.110 VO 17 IS 2 YR 1963 UL http://jech.bmj.com/content/17/2/110.abstract AB