60
60
Zigman WB, Schupf N, Devenny DA, Miezejeski C, Ryan R, Urv TK, Schubert R, Silverman W. Incidence and prevalence of dementia in elderly adults with mental retardation without down syndrome. Am J Ment Retard. 2004 Mar;109(2):126-41
Zigman WB, Schupf N, Devenny DA, Miezejeski C, Ryan R, Urv TK, Schubert R, Silverman W. Incidence and prevalence of dementia in elderly adults with mental retardation without down syndrome. Am J Ment Retard. 2004 Mar;109(2):126-41