MAPT and argyrophilic grain disease: These tau‐involved diseases are collectively referred to as tauopathies and include AD, primary age‐related tauopathy (PART), FTDP‐17, corticobasal degeneration (CBD), progressive supranuclear palsy (PSP), Pick's disease (PiD), argyrophilic grain disease (AGD), globular glial tauopathy (GGT) and chronic traumatic encephalopathy (CTE) [13, 14].