Tadayyon,F. , , Mellat,M. , , Khorrami,M. H. , , Shahdoost,A. A. , and Haghdoost,F. S. . "Comparing the Serum Level of Testosterone and the Relative Frequency of Premature Ejaculation in Patients with Varicocele and Normal Population", Journal of Isfahan Medical School, 28, 124, 2011, 2032-2038.