MAPT and dementia: In the last decade, the combination of fluid amyloid beta (Aβ42, Aβ40, Aβ 42/40 ratio), phosphorylated tau (pTau‐181, pTau‐217, etc.)biomarkers, and magnetic resonance imaging (MRI) have been shown to have predictive value for progression to dementia.2, 3, 4