Engelfriet, C., & Reesink, HW. (1998). Use of cord blood progenitor cells as an alternative for bone marrow transplantation. Vox Sanguinis : international journal of transfusion medicine, 75(2), 156-172. https://doi.org/10.1046/j.1423-0410.1998.75201561.x (Original work published 1998)