PT - JOURNAL ARTICLE ED - , TI - Oral 12 DP - 2005 Nov 01 TA - Occupational and Environmental Medicine PG - e25--e25 VI - 62 IP - 11 4099 - http://oem.bmj.com/content/62/11/e25.short 4100 - http://oem.bmj.com/content/62/11/e25.full SO - Occup Environ Med2005 Nov 01; 62