Cognitive decline before diagnosis of Parkinson's disease - Authors' reply.
UCL Institute of Neurology, University College London, London. Electronic address: a.schrag@ucl.ac.uk.
Anette
A
Schrag
Perelman School of Medicine at the University of Pennsylvania, Philadelphia, USA; Philadelphia Veterans Affairs Medical Center, Philadelphia, USA.
Daniel
D
Weintraub
UCL Institute of Neurology, University College London, London.
Jonathan M
JM
Schott
D060825:Cognitive Dysfunction; D003704:Dementia; D006801:Humans; D009483:Neuropsychological Tests; D010300:Parkinson Disease