Parkinsons DiseaseLancet 373:2055-2066, Lees,A.J.,et al, 2009
Parkinson's DiseaseNEJM 339:1044-1053,1130-1143, Lang,A.E.&Lozano,A.M., 1998
A 60-Year-Old Man with Parkinson's DiseaseJAMA 275:716-722, Olanow,C.W., 1996