MAPT and multiple system atrophy: In the previous study, the authors aimed to measure levels of nEVs and oEVs pS129-α-syn in 32 healthy controls (HC), 46 PD, and 30 MSA samples as well as nEVs and oEVs tau in 54 HCs, 51 PD and 41 MSA samples (13) using samples obtained previously (11).