Correction to Reduced nicotine content cigarettes in smokers of low socioeconomic status: study protocol for a randomized control trial.

The title of the original publication [1] had an error; furthermore there were errors in Fig. 2. The corrected version of the title and of Fig.

Reduced nicotine content cigarettes in smokers of low socioeconomic status: study protocol for a randomized control trial.

Background: The Family Smoking Prevention and Tobacco Control Act gave the Food and Drug Administration jurisdiction over the regulation of all tobacco products, including their nicotine content. Under this act, a major strategy to reduce harm from cigarette tobacco is lowering the nicotine content without causing unintended adverse consequences. Initial research on reduced nicotine content (RNC) cigarettes has shown that smokers of these cigarettes gradually decrease their smoking frequency and biomarkers of exposure.