Excerpt - page 11: "... Despite the over- whelming evidence that cultures of HBDCs contain cells of the osteoblast lin- eage, initial attempts to demonstrate the presence of osteogenic (i.e., boneforming) cells proved unsuccessful. ..."
Excerpt - page 14: "... cells derived from fetal sources often ... a reduced number of total colony-formingcells and bone-formingcells in bone marrow stromal cell cultures from older donor ..."