"further analysis revealed 2 hemizygous deletions in the grandmother that segregate in several of her affected offspring. The first deletion was found in the UGT2B28 locus spanning 7 informative sequence variants across at least 14 kb. The second deletion located in USP17L2 spans 3 informative variants across at least 2 kb. On the whole the findings of the presents study implicate 2 additional genes in the pathogenesis"xsd:string