Mehraban, D., Ansari, M., Keyhan, H., Sedighi Gilani, M., Naderi, G., & Esfehani, F. (2009). Comparison of Nitric Oxide Concentration in Seminal Fluid between Infertile Patients with and without Varicocele and Normal Fertile Men. Urology Journal, 2(2), 106–110. https://doi.org/10.22037/uj.v2i2.260