PARP9 and diffuse large B-cell lymphoma: Interestingly, overexpression of ARTD9 could not be observed so far in other pSTAT1(Y701/S727)-positive or pSTAT3(Y705/S727)-positive subgroups of DLBCLs such as T/HRLBCL or PMLBCL, which molecular profiles resemble (at least in part) those of HR-subtype DLBCL tumors [46, 53–55, 116].