RT Journal Article SR Electronic T1 Smoking cessation services may not reduce inequalities JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 158 OP 159 DO 10.1136/jech.58.2.158 VO 58 IS 2 A1 J Adams A1 M White YR 2004 UL http://jech.bmj.com/content/58/2/158.abstract AB