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Quitting Smoking free resource MedlinePlus Health Information https://medlineplus.gov/quittingsmoking.html
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/27734465/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/27734465
subscription/membership/fee required Wiley https://doi.org/10.1002/14651858.CD005231.pub3
free resource scite Smart Citations https://scite.ai/reports/27734465