MAPT and frontotemporal dementia: Participants in the sFTLD-tau patient group were composed of 3 different clinical phenotypes in more varied proportions (naPPA = 10, CBS = 5, PSP = 6) relative to participants with likely sFTLD-TDP who were mainly diagnosed with svPPA (svPPA = 11, bvFTD+svPPA = 2, FTD-ALS = 1).