Screening for Alzheimer's Disease: Cognitive Impairment in Self-Referred and Memory Clinic-Referred Patients Manuscript Number: 17-0385R1 Author(s): Dag Aarsland, Geir Bråthen, Ragna Espenes, Tormod Fladby, Erik Hessen, Stein Harald Johnsen, Bjørn-Eivind Kirsebom, Knut Waterloo