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Nonnemaker, J.M., Finkelstein, E., Engelen, M. et al. 2009
Giovino, G.A., Chaloupka, F.J., Hartman, A.M. et al. 2009
Doogan, N.J., Wewers, M.E., Berman, M. 2008
Stanton, C., Barnes, R.L., Glantz, S.A. 2008
Epps-Johnson, T., Barnes, R.L., Glantz, S.A. 2008