Studies, Rodents, Proteins, Stem cells, RNA, Messenger - metabolism, Messenger - genetics, Antigens, Signal Transduction - drug effects, Vascular Endothelial Growth Factor A - metabolism, Cell Differentiation - drug effects, Chemokine CXCL12 - metabolism, Stem Cells - metabolism, Culture Media, Conditioned - pharmacology, Paracrine Communication - drug effec...