A Randomized Trial of E-Cigarettes versus Nicotine-Replacement Therapy.
N Engl J Med. 2019 Feb 14;380(7):629-637. doi: 10.1056/NEJMoa1808779. Epub 2019 Jan 30.
N Engl J Med. 2019.
PMID: 30699054
Free article.
Clinical Trial.