4. Relapsed (recurrence or disease progression after achieving a documented clinical response to first- or second-line treatment) or refractory (disease progression while receiving first line or second line treatment). In the case of TNBC, prior initial therapy with at least one known active regimen for TNBC including, but not limited to, any combination of anthracyclines, taxanes, platinum agents, Ixabepilone, and/or cyclophosphamide is required.