H. C. V. Pfeiffer, A. Løkkegaard, M. Zoetmulder, L. Friberg and L. Werdelin Cognitive impairment in early-stage non-demented Parkinson's disease patients Acta Neurologica Scandinavica 129
Article first published online: 11 OCT 2013 | DOI: 10.1111/ane.12189
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