Long-term effectiveness of mailed nicotine replacement therapy: study protocol of a randomized controlled trial 5-year follow-up.
Vladyslav KushnirPeter SelbyLaurie ZawertailoRachel F TyndaleScott T LeatherdaleJohn Alastair CunninghamPublished in: BMC public health (2017)
ClinicalTrials.gov : NCT01429129 , Registered 2 September 2011; NCT03097445 , Registered 25 March 2017.