title: An endorphin-mediated analgesia system: experimental and clinical observations.
mesh_terms: D000818:Animals; D004723:Endorphins / Q000032:analysis / Q000502:physiology*; D006801:Humans; D008526:Medulla Oblongata / Q000502:physiology*; D008636:Mesencephalon / Q000502:physiology*; D009434:Neural Pathways / Q000502:physiology; D010146:Pain / Q000503:physiopathology*; D011957:Receptors, Opioid / Q000032:analysis; D013116:Spinal Cord / Q000502:physiology*
chemical_list: D004723:Endorphins; D011957:Receptors, Opioid