NFKB1 and mature T-cell and NK-cell non-Hodgkin lymphoma: According to those authors, the only clinically relevant information provided by GEP pertains the NF-κB gene expression level (see below).14 Ballester et al15 reported that GEP could discriminate among PTCL of the NOS, AITL and ALCL types, although NOS did not share a single profile.