The post-selection starting material will consist of clinical grade CD34+ cells purified by immunomagnetic selection. A purity of more than 50% CD34+ cells should be obtained after immunomagnetic selection. The percentage of viable cells will be determined by staining with trypan blue. The purified CD34+ cells will be frozen in a 4% albumin solution containing 10% DMSO and conditioned in 2.5 mL cryotubes containing 1x106 CD34+ cells. After thawing, the cell viability should be more than 50%.