title: Middle ear function, biologic variation, and otosurgical alchemy. Can we turn tin ears into gold?
mesh_terms: D001309:Auditory Threshold / Q000502:physiology; D001844:Bone Conduction; D004432:Ear, Middle / Q000502:physiology*; D006309:Hearing / Q000502:physiology*; D006311:Hearing Disorders / Q000601:surgery; D006801:Humans; D008875:Middle Aged