PT - JOURNAL ARTICLE ED - , TI - Abstracts DP - 2007 Oct 01 TA - Journal of Epidemiology and Community Health PG - A1--A44 VI - 61 IP - suppl 1 4099 - http://jech.bmj.com/content/61/suppl_1/A1.short 4100 - http://jech.bmj.com/content/61/suppl_1/A1.full SO - J Epidemiol Community Health2007 Oct 01; 61