Incidence of Mild Cognitive Impairment and Dementia in Parkinson's Disease: The Parkinson's Disease Cognitive Impairment Study. Alzforum, 01 Mar 2019 Nicoletti A, Luca A, Baschi R, Cicero CE, Mostile G, Davì M, Pilati L, Restivo V, Zappia M, Monastero R.