Imaging of D2 Dopamine Receptors of Patients with Parkinson’s Disease using Single Photon Emission Computed Tomography and Iodobenzamide 1123 - Laulumaa, V; Kuikka, JT; Soininen, H; Bergström, K; Länsimies, E; Riekkinen, P (Arch Neurol, 1993)