Kinetics of engraftment of individual NOD/SCID mice transplanted with fresh or ex vivo–expanded CD34⁺ cells. The figure represents the individual kinetics of engraftment of NOD/SCID mice shown in Fig 2, which were transplanted with fresh (closed symbols) or with the equivalent cell product generated after incubation with IL-3/IL-6/SCF (open symbols). For further details, see legend to Fig 2.