YWHAZP4 and Intellectual disability: Similar to the YWHAZ phenotype, the chromosomal regions harboring YWHAZP4 (6q22.33), YWHAZP5 (10q25.1), YWHAZP6 (9p13.3), YWHAZP8 (Xq13.2), and YWHAZP10 (Xp11.4) are associated with intellectual disability [49,50,51,52,53].