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Centers for Disease Control and Prevention 2010
Centers for Disease Control and Prevention 2009
Ross, H., Shariff, S., Gilmore, A.B. 2009
Asaria, P., Chisholm, D., Mathers, C. et al. 2007
Gallus, S., Schiaffino, A., La Vecchia, C. et al. 2006
Gallus, S., Schiaffino, A., La Vecchia, C. et al. 2006