Savas, M., Yeni, E., Verit, A., Gulum, M., Aksoy, N., Ciftci, H., Celik, H., Altunkol, A., & Oncel, H. (2010). Acute effect of phosphodiesterase type 5 inhibitor on serum oxidative status and prolidase activities in men with erectile dysfunction . Clinics, 65(12), 1311-1314. https://doi.org/10.1590/S1807-59322010001200014