- Group A (post-induction therapy)- patients who have received only one prior treatment regimen (eg VAD, Thal/Dex, BLT-D, MP, BiRD, or DVd) with at least 20 patients having received a Revlimid based regimen or Group B(>1st line of therapy)- patients with relapsed/refractory multiple myeloma who have received two or more prior treatment regimens .