NFKB2 and common variable immunodeficiency: utilised high-throughput next-generation sequencing (NGS) to identify pathogenic variants in their cohort of children with refractory ITP and it was observed that 9.1% children had pathogenic variants related to CVID {5 TNFRSF13; 1 LRBA; 1 NF-κB2; and 1 caspase recruitment domain 11 (CARD11)}.