Orthostatic hypotension and attention in Parkinson's disease with and without dementia.
Peralta C, Stampfer-Kountchev M, Karner E, K?llensperger M, Geser F, Wolf E, Seppi K, Benke T, Poewe W, Wenning GK. Orthostatic hypotension and attention in Parkinson's disease with and without dementia. J Neural Transm (Vienna). 2007; 114(5):585-8.