title: [Approach to patients with postoperative impotence--case studies and a questionnaire survey].
mesh_terms: D007172:Erectile Dysfunction / Q000453:epidemiology*; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000453:epidemiology*; D011795:Surveys and Questionnaires