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. Author manuscript; available in PMC: 2019 Dec 1.
Published in final edited form as: Prev Med. 2018 Apr 4;117:24–29. doi: 10.1016/j.ypmed.2018.04.011

Figure 1.

Figure 1

Changes in mean cotinine by Usual Nicotine Content (UNC) group and Very Low Nicotine Content (VLNC) compliance groups categorized with the Benowitz method and self-reported compliance (10).