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Prevalence at birth of Down syndrome in Manizales, Caldas, ..:

Valencia Arana, Carlos Andrés ; González Arango, Ricardo ; Gaitán Quintero, Lina María...
Clearinghouse. Annual Report International Clearinghouse for Birth Defects monitoring systems. ICBDMS, Beagen. ISNN 0743-5703; 2002..  , 2008