PT - JOURNAL ARTICLE AU - Keith Palmer TI - Work in brief DP - 2006 Nov 01 TA - Occupational and Environmental Medicine PG - 717a--717a VI - 63 IP - 11 4099 - http://oem.bmj.com/content/63/11/717a.short 4100 - http://oem.bmj.com/content/63/11/717a.full SO - Occup Environ Med2006 Nov 01; 63