Guerra, G., V. Poletto, M. Biggiogera, S. Dragoni, D. Lim, C. Porta, S. Montagnani, D. Tafuri, V. Rosti, and F. Moccia. “Circulating Endothelial Progenitor Cells from Patients With Renal Cell Carcinoma Display Aberrant VEGF Regulation, Reduced Apoptosis and Altered Ultrastructure”. Italian Journal of Anatomy and Embryology, vol. 120, no. 1, Sept. 2015, p. 111, https://oajournals.fupress.net/index.php/ijae/article/view/4065.