TBX21 and necrotizing enterocolitis: In A-NEC-XPB1s patients compared with A-NEC-XBP1u patients, the relative expression levels of TBX21 and GATA3 were up-regulated (Figure 5A and 5B), while the relative expression of RORC, IL17A and FOXP3 remained unaltered (Figure S5D to S5F).