MAPT and frontotemporal dementia: The major subtypes of FTLD-tau are Pick’s disease (PiD), corticobasal degeneration (CBD), progressive supranuclear palsy (PSP), globular glial tauopathy (GGT), frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP-17), and rare unclassifiable tauopathies.