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4. Familial X-linked mental retardation syndrome associated with minor congenital anomalies, macro-orchidism, and fragile X-chromosome;Pueschel, S.M.; Hays, R.M.; Mendoza, T.;Am J Ment Defic,1983
5. The fragile X syndrome. A study of 83 families;Fryns, J.P.; Van den Berghe, H.;Clin Genet,1984