Visual event-related potentials in progressive supranuclear palsy, corticobasal degeneration, striatonigral degeneration, and Parkinson's disease. - Wang,L.; Kuroiwa,Y.; Kamitani,T.; Li,M.; Takahashi,T.; Suzuki,Y.; Shimamura,M.; Hasegawa,O. (J Neurol, 2000)