Randomized Controlled Trial

Treating smokers before the quit date: can nicotine patches and denicotinized cigarettes reduce cravings?

Nicotine Tob. Res. 2007 Nov 1;9(11):1139-46.
Clinical Trial

Effect of an electronic nicotine delivery device (e-Cigarette) on smoking reduction and cessation: a prospective 6-month pilot study.

Bmc Public Health. 2011 Jan 1;11:786.
Article

Nicotine and carcinogen exposure with smoking of progressively reduced nicotine content cigarette.

Cancer Epidemiol. Biomarkers Prev. 2007 Nov 1;16(11):2479-85.