Objective To study the clinical significance of abnormal protein bands(APB)in multiple myeloma(MM) patients treated with bortezomib-based induction regimen and autologous stem cell transplantation(ASCT) Objective To study the clinical significance of abnormal protein bands (APB) in multiple myeloma (MM) patients treated with bortezomib-based induction regimen and autologous stem cell transplantation (ASCT)