title: A taxonomy of pain.
mesh_terms: D000818:Animals; D001933:Brain Stem / Q000502:physiology; D006801:Humans; D010146:Pain / Q000145:classification*; D010525:Peripheral Nerves / Q000502:physiology; D011584:Psychology; D011984:Sensory Receptor Cells / Q000502:physiology; D013116:Spinal Cord / Q000502:physiology