OPN1MW and argyrophilic grain disease: We found that the AGD, CBD (P = 0.0136), GGT (P = 0.0007), and PSP patient samples (P = 0.0044) were able to infect the Tau4RD*D358E-YFP cells, though the AGD sample infection was not statistically different from the negative controls (P = 0.8057).