Office-Based Screening for Dementia in Parkinson Disease: The Montreal Parkinson Risk of Dementia Scale in 4 Longitudinal Cohorts. - Dawson BK; Fereshtehnejad SM; Anang JBM; Nomura T; Rios-Romenets S; Nakashima K; Gagnon JF; Postuma RB (JAMA neurology, 2018)