Hilker, R., Herholz, K., Schuster, A., Voges, J., Ghaemi, M., Sturm, V., et al. (2002). The antiparkinsonian effects of deep brain stimulation in the subthalamic nucleus are not mediated by an increase of tonic striatal dopamine receptor stimulation: evidence from serial [11C]raclopride-PET in parkinsonian humans. NeuroImage, 16(3/P2), S63-S63.