RT Journal Article SR Electronic T1 High-resolution diffusion tensor imaging in the substantia nigra of de novo Parkinson disease JF Neurology JO Neurology FD Lippincott Williams & Wilkins DO 10.1212/01.wnl.0000340982.01727.6e A1 D. E. Vaillancourt A1 M. B. Spraker A1 J. Prodoehl A1 I. Abraham A1 D. M. Corcos A1 X. J. Zhou A1 C. L. Comella A1 D. M. Little YR 2009 UL http://n.neurology.org/content/early/2009/01/07/01.wnl.0000340982.01727.6e.abstract AB