A peer-reviewed journal covering developments in the rapidly expanding area of ex vivo manipulation of cells of the hematopoietic system for therapeutic purposes. Includes engineering of stem cell grafts, immunotherapy, ex vivo expansion and hematopoiesis, cell targeting, gene therapy, cell cryopreservation and storage, graft evaluation, laboratory management, and regulatory compliance. Emphasis is on the transition of technologies from basic research to early clinical applications to demonstrate efficacy. Discontinued - now Stem Cells and Development.