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Zhu, Shu-Hong, Sharon E. Cummins, Anthony C. Gamst, Shiushing Wong, and Tyson Ikeda. "Quitting Smoking Before and After Varenicline: A Population Study Based On Two Representative Samples of U.S. Smokers." Tob Control 2015.

Zhu, Shu-Hong, et al. "Quitting Smoking Before and After Varenicline: A Population Study Based On Two Representative Samples of U.S. Smokers." Tob Control 2015.