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A Randomized Trial of E-Cigarettes versus Nicotine-Replacement Therapy.

Hajek P, Phillips-Waller A, Przulj D, Pesola F, Myers Smith K, Bisal N, Li J, Parrott S, Sasieni P, Dawkins L, Ross L, Goniewicz M, Wu Q, McRobbie HJ.

N Engl J Med. 2019 Jan 30. doi: 10.1056/NEJMoa1808779. 

Abstract

https://www.ncbi.nlm.nih.gov/pubmed/30699054