NFKB1 and cancer: Other proteins related to inflammation, such as PARP435 (also involved in DNA repair36, 37 and target for several inhibitors developed for cancer treatment) and E2AK2, which regulates NF‐kappaB transcription factor activity,38, 39 and the oxidative stress‐related protein RIFK40 were found to be upregulated in ECs exposed to serum samples from SR‐aGVHD patients.