The data presented here are preliminary and were obtained from the statistical center of the CIBMTR. The analysis has not been reviewed or approved by the advisory or scientific committees of the CIBMTR.

Registration of allogeneic HCT with the CIBMTR is voluntary for non-US centers and was voluntary for US centers through 2007; US centers have been required to register all allogeneic HCTs with the CIBMTR since 2008.