PT - JOURNAL ARTICLE ED - , TI - Hygieia DP - 2004 Apr 01 TA - Journal of Epidemiology and Community Health PG - 356--356 VI - 58 IP - 4 4099 - http://jech.bmj.com/content/58/4/356.short 4100 - http://jech.bmj.com/content/58/4/356.full SO - J Epidemiol Community Health2004 Apr 01; 58