Parkinsons DiseaseLancet 373:2055-2066, Lees,A.J.,et al, 2009
DystoniaNEJM 355:818-829, Tarsy,D. &Simon,D.K., 2006
Parkinson's DiseaseNEJM 339:1044-1053,1130-1143, Lang,A.E.&Lozano,A.M., 1998