TY - JOUR T1 - Free serum testosterone level in male rats treated with tribulus alatus extracts JO - International braz j urol A1 - El-Tantawy, Walid H. A1 - Temraz, Abeer A1 - El-Gindi, Omayma D. SN - 1677-5538 UL - 10.1590/S1677-55382007000400015 VL - 33 Y1 - 2007 PB - Brasil ER -