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Flexible and extended dosing of nicotine replacement therapy or varenicline in comparison to fixed dose nicotine replacement therapy for smoking cessation: rationale, methods and participant characteristics of the FLEX trial.
Tulloch H, Pipe A, Els C, Aitken D, Clyde M, Corran B, Reid RD. Tulloch H, et al. Among authors: clyde m. Contemp Clin Trials. 2014 Jul;38(2):304-13. doi: 10.1016/j.cct.2014.05.011. Epub 2014 May 23. Contemp Clin Trials. 2014. PMID: 24861558 Clinical Trial.
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