Silver Book Fact
Many studies estimate that over 90% of Parkinson’s disease patients suffer from a type of sleep disturbance.
Abdelgabar A, Sharma J. Sleep Disorders in Parkinson’s Disease. Int J Clin Prac. 2003; 57(9): 781-7. http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=14686569&dopt=Abstract