Lewy- and Alzheimer-type pathologies in Parkinson's disease dementia: which is more important? by Compta, Y, Parkkinen, L, O'Sullivan, SS, Vandrovcova, J, Holton, JL, Collins, C, Lashley, T, Kallis, C, Williams, DR, de Silva, R, Lees, AJ, Revesz, T