RT Journal Article SR Electronic T1 The impact of implementation of smoke-free legislation in England on cotinine levels in adults JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 50 OP 50 DO 10.1136/jech.2009.096719x VO 63 IS Suppl 2 A1 H. Wardle A1 S. Nicholson A1 J. Mindell A1 R. Craig YR 2009 UL http://jech.bmj.com/content/63/Suppl_2/50.abstract AB