P4‐216: COMPARISON OF PLASMA Aβ ASSAYS AS PHARMACODYNAMIC READ‐OUT FOR BACE1 INHIBITOR TREATMENT IN CANINES. (1st July 2014) - Van Broeck, Bianca; Meulders, Greet; Nogueira, Sofia; Dhuyvetter, Deborah; Borghys, Herman; Mercken, Marc