Neoplastic Stem CellsStem CellsHematopoietic Stem CellsStem Cell TransplantationEmbryonic Stem CellsAdult Stem CellsPluripotent Stem CellsApoptosisHematopoietic Stem Cell TransplantationStem Cell NicheNeural Stem CellsCell DifferentiationInduced Pluripotent Stem CellsMesenchymal Stem Cell TransplantationMultipotent Stem CellsApoptosis Regulatory ProteinsCaspasesStem Cell FactorMesenchymal Stromal CellsCells, CulturedCaspase 3Cell Proliferation