Performing fuctional magnetic resonance imaging in patients with Parkinson's disease treated with deep brain stimulation - Arantes, Paula R.; Cardoso, Ellison F.; Barreiros, Maria A.; Teixeira, Manoel Jacobsen; Gonçalves, Márcia R.; Barbosa, Egberto R.; Sukwinder, Sukhi Shergill; Leite, Claudia da Costa; Amaro, Edson (Movement Disorders, 2006)