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Family study uncovers sex-linked mental retardation without major physical or biochemical abnormalities, suggesting a potential common condition.
Mental retardation in nine members of a family, without major physical, neurologic, cytogenetic or biochemical abnormalities, appears to belong to the infrequently described, but possibly common, nonspecific sex-linked mental retardation.
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Snyder et al. (1969) studied this question.
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