RT Journal Article SR Electronic T1 Professor D.D. Reid. MD Aberdeen, PHD DSc London, FRCP London. JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 229 OP 234 DO 10.1136/jech.32.4.229 VO 32 IS 4 A1 G Rose YR 1978 UL http://jech.bmj.com/content/32/4/229.abstract AB