Sexual difficulties after 50: the urologist's view.
D000368:Aged; D003075:Coitus / Q000453:epidemiology*; D004542:Ejaculation / Q000502:physiology; D007172:Erectile Dysfunction / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011468:Prostatectomy; D012725:Sexual Behavior