INPP5K and Intellectual disability: In fact, our findings of a founder effect for the INPP5K c.67G > A variant in six unrelated Italian patients affected by an easy recognizable phenotype, characterized by the triade of muscle dystrophy, short stature, and intellectual disability and should lead us to consider for the diagnosis of this clinical phenotype, especially if originating from the same area of southern Italy (Puglia), sequencing of exon 2 of INPP5K as the first screening step.