…dementia (VCID) is the second leading cause of dementia behind Alzheimer's disease, and is a frequent comorbidity in the Alzheimer's patient (Cooper and Mitchell 2016; Dichgans and Leys 2017; Greenberg et al. [for MarkVCID consortium] 2017; Kalaria 2016; Perrotta et al. 2016; Sudduth et al. 2017).