RT Journal Article SR Electronic T1 Dr Melia and coauthors reply JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 166 OP 167 DO 10.1136/jech.37.2.166 VO 37 IS 2 YR 1983 UL http://jech.bmj.com/content/37/2/166.abstract AB