Frontotemporal lobar degeneration: a consensus on clinical diagnostic criteria - Neary, D; Snowden, JS; Gustafson, L; Passant, U; Stuss, D; Black, S; Freedman, M; Kertesz, A; Robert, PH; Albert, M; Boone, K; Miller, BL; Cummings, J; Benson, DF (Neurology, 1998)