The effects of warning smokers on perceived risk, worry, and motivation to quit
Annals of Behavioral Medicine (2009) - Comment
pubmed: 19255818  doi: 10.1007/s12160-009-9085-8  issn: 1532-4796  issn: 0883-6612 

Renee E. Magnan, Amber R. Köblitz, Desiree J. Zielke, Kevin D. McCaul