Concordance between severity of disease, prevalence of nonmotor symptoms, patient-reported quality of life and disability and use of medication in Parkinson's disease

Raggi A, Leonardi M, Covelli V, Albanese A, Soliveri P, Carella F, Romito L. Concordance between severity of disease, prevalence of nonmotor symptoms, patient-reported quality of life and disability and use of medication in Parkinson's disease. Neurol Sci. 2012; 33(4): 847-53.