- For patients in the sorafenib cohort, no prior therapy with sorafenib is allowed and at least 1 line of prior therapy is required including prior: VEGF-targeting therapy (such as sunitinib, axitinib, tivozanib, bevacizumab), mTOR-targeting therapy (such as everolimus, temsirolimus), immunotherapy (such as anti-PD-1 or anti-PD-L1), cytokine therapy (such as interleukin-2, IFN-a) or cytotoxic systemic chemotherapy allowed.