Rapid hematopoietic recovery in dogs receiving transplants of lentivirally transduced CD34-enriched cells in an overnight transduction protocol. For all 3 dogs, the absolute neutrophil counts (A) and the platelet counts (B) after transplantation are displayed. The solid line marks the time course of average cell numbers of all 3 dogs. All animals engrafted without delay and faster than historic controls receiving transplants of cells transduced in a 3-day transduction protocol.