 - Diagnosis of MM and documentation of treatment with an IMiD and proteasome inhibitor. Must have had 2 prior regimenslines of therapy but there is no maximum number of prior regimens and prior autologous bone marrow transplant is acceptable if 12 weeks from transplantation. A line of therapy is defined as a course of therapy that is not interrupted by progressive disease. For example, induction therapy, autologous stem cell transplantation, and maintenance therapy without intervening progressive disease is one line of therapy. 