P3‐234: ELEVATED SERUM DICKKOPF‐1 IS ASSOCIATED WITH PROGRESSIVE COGNITIVE DECLINE IN COMMUNITY‐DWELLING OLDER ADULTS WITH MILD COGNITIVE IMPAIRMENT AND MILD‐TO‐MODERATE ALZHEIMER'S DISEASE. (1st July 2006) - Tay, Laura; Leung, Bernard; Wee, Sharon; Ali, Noorhazlina; Chan, Mark; Lim, Wee-Shiong