Intrauterine transplantation of human fetal mesenchymal stem cells from first-trimester blood repairs bone and reduces fractures in osteogenesis imperfecta mice. by Guillot, P, Abass, O, Bassett, J, Shefelbine, S, Bou-Gharios, G, Chan, J, Kurata, H, Williams, G, Polak, J, Fisk, N