RT Journal Article SR Electronic T1 SHORT REVIEWS JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 104 OP 104 DO 10.1136/jech.48.1.104 VO 48 IS 1 A1 Grime, Peter YR 1994 UL http://jech.bmj.com/content/48/1/104.1.abstract AB