Absence of the amyloid precursor protein gene mutation (APP717: Val->Ile) in 85 cases of early onset Alzheimer's disease. Issue 1 (January 1993) - Brice, A; Boch, A L; Stevanin, G; Khati, C; Dubois, B; Agid, Y; Campion, D; Clerget, F; Mallet, J; Bellis, M