E-cigarettes and smoking cessation in real-world and clinical settings: a systematic review and meta-analysis.
Lancet Respir Med. 2016 Feb;4(2):116-28. doi: 10.1016/S2213-2600(15)00521-4. Epub 2016 Jan 14.
Lancet Respir Med. 2016.
PMID: 26776875
Free PMC article.
Review.