P2‐231: TWO CHANNEL EEG WITH EVENT‐RELATED POTENTIALS AS BIOMARKERS OF DEMENTIA DUE TO ALZHEIMER'S DISEASE. (1st July 2006) - Kim, Jaeuk Uk; Choi, Jungmi; Ku, Boncho Uk; Kim, Gahey Uk; Go, Ho-Yeon; Yu, Yongkwon