Relapses may occur either extramedullary (very common in this setting) or systemic. In order to reduce the risk of systemic relapses the investigators will use maintenance therapy with Lenalidomide (Len) which, together with bortezomib (Bz) should contribute to eradicate minimal residual disease (MRD). In case the patient do not obtain complete remission or near complete remission after transplant, in addition to the maintenance therapy, the investigators will use four intensification cycles with VRD (Bz-Len-Dexamethasone).