Cerebrospinal fluid amyloid-β and phenotypic heterogeneity in de novo Parkinson's disease
Guido Alves, Kenn Freddy Pedersen, Bastiaan R Bloem, Kaj Blennow, Henrik Zetterberg, George F Borm, Turi O Dalaker, Mona K Beyer, Dag Aarsland, Ulf Andreasson, Johannes Lange, Ole-Bjørn Tysnes, Robert Zivadinov, Jan Petter Larsen
Journal of Neurology, Neurosurgery & Psychiatry May 2013, 84 (5) 537-543; DOI: 10.1136/jnnp-2012-303808