VEGF expression by mesenchymal stem cells contributes to angiogenesis in pancreatic carcinoma

B. M. Beckermann, Georgios Kallifatidis, A. Groth, D. Frommhold, A. Apel, J. Mattern, A. V. Salnikov, G. Moldenhauer, W. Wagner, A. Diehlmann, R. Saffrich, M. Schubert, A. D. Ho, N. Giese, M. W. Büchler, H. Friess, P. Büchler, I. Herr