United States

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Manning, W.G., Mullahy, J. 2001

Farrelly, M.C., Bray, J.W., Pechacek, T. et al. 2001

Emery, S., White, M.M., Pierce, J.P. 2001

Choi, W.S., Gilpin, E.A., Farkas, A. J. et al. 2001

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Tauras, J.A., Chaloupka, F.J. 2001