A longitudinal study of motor performance and striatal [18F]fluorodopa uptake in Parkinson’s disease - Catherine L. Gallagher; Sterling C. Johnson; Barbara B. Bendlin; Moo K. Chung; James E. Holden; Terrence R. Oakes; Benjamin R. Brooks; Richard A. Konopacki; Selami Dogan; James H. Abbs; Guofan Xu; Robert J. Nickles; et al. (Brain Imaging and Behavior, 2011)