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Revista de Saúde Pública
Print version ISSN 0034-8910On-line version ISSN 1518-8787

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HIJAR-MEDINA, Martha C.; LOPEZ-LOPEZ, Ma. Victoria; FLORES-ALDANA, Mario  and  ANAYA, Rafael. Rev. Saúde Pública [online]. 1997, vol.31, n.1, pp.100-104. ISSN 1518-8787.



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