Higher nigrostriatal dopamine neuron loss in early than late onset Parkinson's diasease?: A 99mTC TRODAT-1 SPECT study - shih, Ming Chi; Andrade, Luiz Augusto Franco de; Amaro Junior, Edson; Felicio, Andre Carvalho; Ferraz, Henrique Ballalai; Wagner, Jairo; Hoexter, Marcelo Queiroz; Lin, Li Fu; Fu, Yang Kai Fu; Mari, Jair Jesus; Tufik, Sergio; Bressan, Rodrigo Affonseca (Movement Disorders, 2007)