TY - JOUR T1 - Dr Melia and coauthors reply JF - Journal of Epidemiology and Community Health JO - J Epidemiol Community Health SP - 166 LP - 167 DO - 10.1136/jech.37.2.166 VL - 37 IS - 2 A2 - , Y1 - 1983/06/01 UR - http://jech.bmj.com/content/37/2/166.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -