Congress Costs variation related to illness severity and motor and non-motor symptoms in patients with parkinson’s disease Authors: Martínez-Martín P, Rodríguez-Blázquez C, Ramírez P, Forjaz MJ, Frades-Payo B, Cubo E, De Pedro-Cuesta J, Lizán L on behalf of the ELEP GROUP Year: 2013 Congress: XX World Congress on Parkinson´s Diseases and Related Disorders