PT - JOURNAL ARTICLE ED - , TI - Correction AID - 10.1136/oemed-2012-100979corr1 DP - 2013 Jul 01 TA - Occupational and Environmental Medicine PG - 520--520 VI - 70 IP - 7 4099 - http://oem.bmj.com/content/70/7/520.2.short 4100 - http://oem.bmj.com/content/70/7/520.2.full SO - Occup Environ Med2013 Jul 01; 70