Snus undermines quit attempts but not abstinence: a randomised clinical trial among US smokers
Matthew J Carpenter, Amy E Wahlquist, Jessica L Burris, Kevin M Gray, Elizabeth Garrett-Mayer, K Michael Cummings, Anthony J Alberg
Tobacco Control Mar 2017, 26 (2) 202-209; DOI: 10.1136/tobaccocontrol-2015-052783