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1by Luis A. Merino, Gabriela E. Hreñuk, María C. Ronconi, José M. AlonsoGet access
Published in Revista Panamericana de Salud Pública (2004)
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2by Silvia González Alonso, Jesús Esteban-Hernández, Yolanda Valcárcel Rivera, Valentín Hernández-Barrera, Ángel Gil de MiguelGet access
Published 2010
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