CBS and Parkinson disease: We found that clusterin was elevated in FTD (20.22±10.47 ng/mL), PSP (18.42±8.84 ng/mL) and CBS (16.16±6.07 ng/mL) (figure 3A) but not elevated in RBD (10.01±5.22 ng/mL), clinical PD (9.72±6.02 ng/mL), MSA (6.84±3.24 ng/mL) or HC (8.67±4.92 ng/mL).