The number of people with Parkinson’s disease in the U.S. is expected to double between 2005 and 2030.
Dorsey, E. Ray, Radu Constantinescu, Joel P. Thompson, Kevin M. Biglan, Robert G. Holloway, Karl Kieburtz, Fred J. Marshall, Bernard M. Ravina, Giovanni Schifitto, Andrew Siderowf, and Caroline M. Tanner. Projected Number of People with Parkinson Disease in the Most Populous Nations, 2005 Through 2030. Neurology. 2007; 68(5): 384-6. http://www.neurology.org/cgi/content/abstract/68/5/384