Yevgenia Rosenblum1,2, Jurgen A H R Claassen3. 1. Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands. 2. Sackler School of Medicine, Department of Neurology and Neurosurgery, Tel Aviv University, Tel Aviv, Israel. 3. Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Department of Geriatrics, Nijmegen, The Netherlands.