Brain Stem Pathology in Parkinson's Disease: An Evaluation of the Braak Staging Model - Kingsbury,AE; Bandopadhyay,R; Silveira-Moriyama,L; Ayling,H; Kallis,C; Sterlacci,W; Maeir,H; Poewe,W; Lees,AJ (MOVEMENT DISORDERS, 2010)