GATA1 and Macrothrombocytopenia: A GATA1 missense *414Rext*41 variant in the C-terminal termination codon leading to a X-linked blood group Lu(a-b-) phenotype with mild bleeding and mild macrothrombocytopenia was reported to be associated with paucity of α- and δ-granules and absent second wave of ADP- and epinephrine-induced platelet aggregation in one affected male [40].