A direct effect of hyperinsulinemia on serum sex hormone-binding globulin levels in obese women with the polycystic ovary syndrome. - Nestler,JE.; Powers,LP.; Matt,DW.; Steingold,KA.; Plymate,SR.; Rittmaster,RS.; Clore,JN.; Blackard,WG. (J Clin Endocrinol Metab, 1991)