P2‐312: RAPIDLY PROGRESSIVE DEMENTIAS: ETIOLOGIES FOUND IN A HIGH COMPLEXITY REFERRAL CENTER IN BUENOS AIRES. (1st July 2006) - Da Prat de Magalhaes, Gustavo Andres; Rojas, Galeno; Leis, Adriana; Cesarini, Martin; Etcheverry, Jose Luis; Sanchez, Maria Pilar; Bullrich, Maria Bres; Rojas, Natalia Gonzalez; Parisi, Virginia Laura; Persi, Gabriel Gustavo; Gatto, Emilia