title: Ultrastructural alterations in unmyelinated fibers in polyneuropathies.
mesh_terms: D001369:Axons / Q000648:ultrastructure; D006801:Humans; D009410:Nerve Degeneration; D009422:Nervous System Diseases / Q000473:pathology*; D009474:Neurons / Q000648:ultrastructure*; D013497:Sural Nerve