Differentiating effects of somatomedin-C/insulin-like growth factor I and insulin on Leydig and Sertoli cell functions J. M. SAEZ, P. G. CHATELAIN, Marie-Hélène PERRARD-SAPORI, Christine JAILLARD and Danielle NAVILLE Reprod. Nutr. Dévelop., 28 4B (1988) 989-1008 DOI: 10.1051/rnd:19880701