Three articles recruited ENKTL patients [15, 19, 20]; two included PTCL-NOS patients [17, 18]; and one each enrolled natural killer/T-cell lymphoma (NKTL) [14] and nasal natural killer/T-cell lymphoma (NNKTL) cases [16]. This evidence concerns the gene TNFRSF10B and T-cell non-Hodgkin lymphoma.