PT - JOURNAL ARTICLE ED - , TI - Oral 14 DP - 2005 Nov 01 TA - Occupational and Environmental Medicine PG - e27--e27 VI - 62 IP - 11 4099 - http://oem.bmj.com/content/62/11/e27.short 4100 - http://oem.bmj.com/content/62/11/e27.full SO - Occup Environ Med2005 Nov 01; 62