The pre-treatment period includes the screening visit in which participants provide informed consent in writing in order to take part in the study. The patient is then assessed to determine his/her eligibility. The selection process will begin 21 days before the first dose of medication is administered (days -21 to 0). All procedures during the pre-treatment period will be carried out after completion of the two cycles of post-transplant consolidation with VRD which coincide with the end-of-study visit of clinical trial GEM2012MENOS65.