Proactive tobacco treatment offering free nicotine replacement therapy and telephone counselling for socioeconomically disadvantaged smokers: a randomised clinical trial
Steven S Fu, Michelle van Ryn, David Nelson, Diana J Burgess, Janet L Thomas, Jessie Saul, Barbara Clothier, John A Nyman, Patrick Hammett, Anne M Joseph
Thorax May 2016, 71 (5) 446-453; DOI: 10.1136/thoraxjnl-2015-207904