RT Journal Article SR Electronic T1 Correction JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 1008 OP 1008 DO 10.1136/jech-2011-142976e.88corr1 VO 68 IS 10 YR 2014 UL http://jech.bmj.com/content/68/10/1008.1.abstract AB