Ozgur BC, Gonenc F, Yazicioglu AH. Sildenafil or Vardenafil Nonresponders’ Erectile Response to Tadalafil. Urol J [Internet]. 2009 Dec. 17 [cited 2026 Jul. 8];6(4):267-71. Available from: https://journals.sbmu.ac.ir/urolj/index.php/uj/article/view/502