PT - JOURNAL ARTICLE ED - , TI - CORRECTION AID - 10.1136/oem.2003.008680corr1 DP - 2004 Aug 01 TA - Occupational and Environmental Medicine PG - 721--721 VI - 61 IP - 8 4099 - http://oem.bmj.com/content/61/8/721.3.short 4100 - http://oem.bmj.com/content/61/8/721.3.full SO - Occup Environ Med2004 Aug 01; 61