%0 Journal Article %A Matthew J Carpenter %T Proactive recruitment in clinical trials: an idea whose time has come %D 2011 %R 10.1136/tc.2010.042564 %J Tobacco Control %P 317-317 %V 20 %N 4 %U https://tobaccocontrol.bmj.com/content/tobaccocontrol/20/4/317.full.pdf