title: The opioid system in the restless legs and nocturnal myoclonus syndromes.
mesh_terms: D004723:Endorphins / Q000502:physiology*; D006801:Humans; D009207:Myoclonus / Q000503:physiopathology*; D012148:Restless Legs Syndrome / Q000503:physiopathology*; D012890:Sleep / Q000502:physiology*
chemical_list: D004723:Endorphins