11 Milewski Milewski M M Żygulska Żygulska M M Bal Bal J J Deelen Deelen WH WH Obersztyn Obersztyn E E Bocian Bocian E E Halley Halley DJJ DJJ Horst Horst J J Mazurczak Mazurczak T T Analysis of unstable DNA sequence in FMR-1 gene in families of Polish origin with fragile X syndrome Analysis of unstable DNA sequence in FMR-1 gene in families of Polish origin with fragile X syndrome Acta Biochem Pol Acta Biochem Pol 1996 1996 43 43 383 383 388 388. Here, FMR1 is linked to fragile X syndrome.