CHEK1 and mature T-cell and NK-cell non-Hodgkin lymphoma: Furthermore, as we found that CHEK1 was related to a shorter OS for nodal PTCL in the multivariate analysis, and for PTCL-NOS in the univariate analysis, we hypothesize that ixazomib should be tested in these diseases, as proposed by Boonstra et al. in his article [25].