A European multicentre PET study of fibrillar amyloid in Alzheimer's disease. ανά Nordberg, A, Carter, S, Rinne, J, Drzezga, A, Brooks, D, Vandenberghe, R, Perani, D, Forsberg, A, Långström, B, Scheinin, N, Karrasch, M, Någren, K, Grimmer, T, Miederer, I, Edison, P, Okello, A, Van Laere, K, Nelissen, N, Vandenbulcke, M, Garibotto, V, Almkvist, O, Kalbe, E, Hinz, R, Herholz, K