Examples of monoclonal paraprotein decline following autologous HCT (auto) and nonmyeloablative allogeneic HCT (allo). GVHD indicates graft-versus-host disease; mos, months after transplantation; Pre-Auto, disease workup immediately before autologous HCT; and Pre-Allo, disease workup after autologous and immediately before allogeneic HCT.