1. Participants has been diagnosed with one of the following neurodegenerative diseases: FTD, Primary Progressive Aphasia (PPA), CBD, PSP, Mild Cognitive Impairement (MCI), Posterior Cortical Atrophy (PCA), AD, PD, PDD, DLB, FTD-ALS and is co-enrolled in one of the following protocols 069801, 298201, 358500, 703940, 811040, 819586, 822691 and 822926 for these conditions.