1. From the Department of Psychology (J.T.L.W., B.M.), University of Stirling, Stirling, UK; Outcomes Research (A.Hareendran), Pfizer Ltd, Sandwich, UK; the Department of Medicine for the Elderly (A.Hendry), Wishaw General Hospital, Wishaw, UK; the Department of Medicine for the Elderly (J.P.), Victoria Infirmary, Glasgow, UK; and the Department of Neurology (I.B., K.W.M), Institute of Neurological Sciences, Glasgow, UK.