P1‐268: Variants in candidate genes for Alzheimer's disease are associated with declining plasma abeta peptides in adults with down syndrome. (1st July 2015) - Schupf, Nicole; Dang, Lam-Ha; Lee, Annie; Pang, Deborah; Zigman, Warren B.; Luchsinger, Jose A.; Krinsky-McHale, Sharon; Silverman, Wayne; Tycko, Benjamin; Kisselev, Sergey; Clark, Lorraine; Lee, Joseph H.