A double-blind placebo-controlled cross-over clinical trial of DONepezil In Posterior cortical atrophy due to underlying Alzheimer's Disease: DONIPAD study. - Ridha BH; Crutch S; Cutler D; Frost C; Knight W; Barker S; Epie N; Warrington EK; Kukkastenvehmas R; Douglas J; Rossor MN (Alzheimer's research & therapy, 2018)