Jung SH, et al. - Researchers designed this prospective study to assess the efficacy and toxicity of intravenous busulfan and melphalan as a conditioning regimen for autologous stem cell transplantation (ASCT) in patients with multiple myeloma (MM). Observations revealed a high quality response after autologous stem cell transplantation with intravenous busulfex and melphalan conditioning regimen in these patients.