Coculture of fetal MSCs with umbilical cord blood CD34⁺ hematopoietic stem–progenitor cells.

Umbilical cord blood CD34⁺ cells were cocultured with fetal blood MSCs for 6 weeks (n = 2) and for 8 weeks (n = 1) (●). Control data include cord blood CD34⁺ cells grown either on murine stromal cells (○) or without stromal cells (▾).