RT Journal Article SR Electronic T1 Health JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 255 OP 255 DO 10.1136/jech.44.3.255 VO 44 IS 3 A1 Murcott, Anne YR 1990 UL http://jech.bmj.com/content/44/3/255.1.abstract AB