P1‐347: PROGRESSION OF ALZHEIMER'S DISEASE AND PERFORMANCE IN CERAD NEUROPSYCHOLOGICAL TEST BATTERY SUBTESTS: THE FIRST THREE YEARS OF ALSOVA FOLLOW‐UP STUDY. (1st July 2014) - Hallikainen, Ilona Tuulia; Hänninen, Tuomo; Martikainen, Janne; Väätäinen, Saku; Koivisto, Anne Maria