A population of autologous CD34-positive hematopoietic progenitor cells (HPCs) that can be used for autotransplantation. CD34+ HPCs are isolated from human blood stem cells upon apheresis. Upon transplantation with the CD34+ HPCs, these cells can differentiate into a variety of cell types including fibroblasts, osteoblasts, chondrocytes, myocytes, adipocytes, and endothelial cells. Check for active clinical trials using this agent.