Multi-parameter flow cytometric analysis of the lineage (Lin)−CD34+CD45RA− HSPCs compartment in BM samples that had been enriched using the magnetic human CD34 MicroBead kit was performed to compare the frequencies of HES1+ and CD9+ cells between ITP and HC (Fig. 5c). This evidence concerns the gene HES1 and autoimmune thrombocytopenic purpura.