Seasonality in onset of youth smoking parallels seasonality in cigarette sales.

@article{Wellman2003SeasonalityIO,
  title={Seasonality in onset of youth smoking parallels seasonality in cigarette sales.},
  author={Robert J. Wellman and J R DiFranza},
  journal={Tobacco control},
  year={2003},
  volume={12 3},
  pages={339}
}

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