Maher JE, Rohde K, Pizacani B, Dent C, Stark MJ, Dilley JA, Pickle KE, Boysun MJ, Thompson JR, Yepassis-Zembrou P. Does free nicotine replacement therapy for young adults prompt them to call a quitline? Tobacco Control. 2007 Oct 01;16(5):357–8. doi: 10.1136/tc.2006.019398.