Tandem versus single autologous hematopoietic cell transplantation for the treatment of multiple myeloma: a systematic review and meta-analysis.

Evidence bearing on the efficacy of tandem autologous hematopoietic transplant (AHCT) vs a single AHCT in patients with multiple myeloma (MM) is conflicting. We performed a systematic review and meta-analysis to synthesize the existing evidence related to the effectiveness of tandem vs single AHCT in patients with MM.