PT - JOURNAL ARTICLE AU - John R Ashton AU - Carlos Alvarez-Dardet TI - SOMETHING OLD, SOMETHING NEW AID - 10.1136/jech.57.3.161 DP - 2003 Mar 01 TA - Journal of Epidemiology and Community Health PG - 161--161 VI - 57 IP - 3 4099 - http://jech.bmj.com/content/57/3/161.1.short 4100 - http://jech.bmj.com/content/57/3/161.1.full SO - J Epidemiol Community Health2003 Mar 01; 57