MAPT and Alzheimer disease: DLB: Nonspecific for DLB, small study, ratio untested (50); predicts abnormal tau-PET and CSF Aβ42/Aβ40 (51) AD vs. Ctrl, NDD: pTau181 and pTau217 accurate (AUCs) (0.87 – 0.98); DLB part of NDD controls (52)