Catecholamines & Neurologic DiseasesNEJM 293:274, Moskowitz,M.A.,et al, 1975
Chronic Daily HeadacheNeurol 42:32-36, Sheftell,F.D., 1992
Brain Neurotransmitters in Dystonia Musculorum DeformansNEJM 315:347-353, Hornykiewicz,O.,et al, 1986