CP indicates chronic phase; CyR, cytogenetic response; MM, multiple myeloma; MCyr, major cytogenetic response; CCyR, complete cytogenetic response; IM, imatinib mesylate; PR, partial remission; MRD, minimal residual disease; PD, progressive disease; SD, stable disease; EFS, event-free survival; PFS, progression-free survival; RFS, relapse-free survival; and KLH, keyhole limpet hemocyanin.