PT - JOURNAL ARTICLE ED - , TI - Corrections AID - 10.1136/oem.59.7.497 DP - 2002 Jul 01 TA - Occupational and Environmental Medicine PG - 497--497 VI - 59 IP - 7 4099 - http://oem.bmj.com/content/59/7/497.short 4100 - http://oem.bmj.com/content/59/7/497.full SO - Occup Environ Med2002 Jul 01; 59