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1by María del Pilar Crespo, Raúl Heli Corral, Alberto Alzate, Gabriel Carrasquilla, Nory SánchezGet access
Published in Revista Panamericana de Salud Pública (1999)
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2by María Cristina Navas, Fernando de la Hoz, Ketty Mendoza, Gabriel Carrasquilla, Jorge BoshellGet access
Published in Biomédica (1999)
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3by Constanza Collazos, Gabriel Carrasquilla, Milcíades Ibáñez, Lilia Edith LópezGet access
Published in Biomédica (2010)
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