title: Bridge over troubled stem cells.
authors.affiliation: Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, Texas 77030, USA.
authors.forename: Grant A
authors.initials: GA
authors.lastname: Challen
authors.forename: Margaret A
authors.initials: MA
authors.lastname: Goodell
mesh_terms: D000818:Animals; D018380:Hematopoietic Stem Cell Transplantation; D006412:Hematopoietic Stem Cells / Q000166:cytology*; D006801:Humans; D051379:Mice