title: Natural opioids in migraine.
mesh_terms: D004723:Endorphins / Q000172:deficiency / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008881:Migraine Disorders / Q000209:etiology / Q000503:physiopathology*; D009021:Morphine Dependence; D009474:Neurons; D011247:Pregnancy; D011602:Psychophysiologic Disorders / Q000503:physiopathology; D011957:Receptors, Opioid / Q000502:physiology; D012559:Schizophrenia / Q000503:physiopathology; D013375:Substance Withdrawal Syndrome / Q000503:physiopathology
chemical_list: D004723:Endorphins; D011957:Receptors, Opioid