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We describe a family where four brothers show the rare heritable folate sensitive autosomal fragile site (FSAFS) at 19p13 when cells were grown in TC199. Two of the brothers are schizophrenic while one brother is mentally retarded with autistic-like features. The clinical significance of this fragile site however is still unknown.
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Chodirker et al. (1987) studied this question.
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