Vascular factors and risk for neuropsychiatric symptoms in Alzheimer’s disease: the Cache County Study Treiber KA, Lyketsos CG, Corcoran C, Steinberg M, Norton M, Green RC, Rabins P, Stein DM, Welsh-Bohmer KA, Breitner JC, Tschanz JT International Psychogeriatric June 2008 Open .pdf