Forest plots of HRs for mPFS according to T_BR for patients with a response of PR or better after first-line therapy. ||High-risk subgroups were defined by the presence of del(17p), t(4;14), t(14;16), or t(14;20). †Standard-risk subgroups were defined by the absence of high-risk cytogenetics. ‡1q21 subgroups included patients with 1q21 and absence of high-risk cytogenetics. §t(4;14) subgroups included patients with t(4;14) alone. SCT, stem cell transplantation. *P < .05; **P < .01.