- Phase 2: Progression of disease on at least one prior treatment with an mTOR inhibitor (such as everolimus, temsirolimus, ridaforolimus). Other prior systemic therapies including VEGF directed therapy (e.g. sunitinib, sorafenib, bevacizumab) and immunotherapy (e.g. IL-2, interferon-α) are also permitted. Evidence of unidimensionally measurable disease per RECIST 1.1 (Eisenhauer, Therasse et al. 2009).