Adverse events

Subjects will be tested for Minimal Residual Disease (MRD) by Next Generation Sequencing (NGS) and flow cytometry after cycles 8 and 12. A treatment decision was made after cycle 12 based on these results. There are three outcomes based on the IFM trial (Avet-Loiseau et al., 2015): 1) if the subject is MRD-negative by NGS after cycle 8 and 12, the subject went on E-Rd maintenance until disease progression. 2) If the subject is MRD-positive after cycle 8 but MRD-negative after cycle 12, 6 more cycles of E-KRd was given and at the end of 18 cycles, the subject went on E-Rd maintenance until disease progression. 3) Finally, if the subject is MRD-positive at both instances, 12 additional cycles of E-KRd was given and at the end of 24 cycles total, the subject went on E-Rd maintenance until disease progression. Elotuzumab: Elotuzumab will be given on Cycles 1-2 on days 1, 8, 15, 22, Cycles 3 and Beyond on days 1 and 15 Carfilzomib: Carfilzomib will be given on Day 1 and 8 of Cycle 1, Days 1, 8, and 15 of Cycles 2-8, and Days 1 and 15 of Cycles 9 and beyond Lenalidomide: Lenalidomide will be given on days 1-21 for all cycles. Dexamethasone: Dexamethasone will be given as follows: Cycle 1 and 2: Days 1, 2, 8, 9, 15, 16, and 22 Cycles 3 and Beyond: Days 1, 8, 15, and 22