Fibroblast growth factor (FGF) 2 and FGF9 mediate mesenchymal-epithelial interactions of peritubular and Sertoli cells in the rat testis - El Ramy, R; Verot, A; Mazaud, S; Odet, F; Magre, S; Le Magueresse-Battistoni, B (J Endocrinol, 2005)