Ovarian cancer-derived lysophosphatidic acid stimulates secretion of VEGF and stromal cell-derived factor-1α from human mesenchymal stem cells - Jeon, E S; Heo, S C; Lee, I H; Choi, Y J; Park, J H; Choi, K U; Park Do, Y; Suh, D S; Yoon, M S; Kim, J H (Exp Mol Med, 2010)