Pathophysiology of chorea and bradykinesia in Huntington's disease. - Berardelli,A.; Noth,J.; Thompson,P.D.; Bollen,E.L.; Curra,A.; Deuschl,G.; van Dijk,J.G.; Topper,R.; Schwarz,M.; Roos,R.A. (Mov Disord, 1999)