Smokeless tobacco products sold in Massachusetts from 2003 to 2012: trends and variations in brand availability, nicotine contents and design features.
Cullen D, Keithly L, Kane K, Land T, Paskowsky M, Chen L, Hayes R, Li W. Smokeless tobacco products sold in Massachusetts from 2003 to 2012: trends and variations in brand availability, nicotine contents and design features. Tob Control. 2015 May; 24(3):256-62.