CD14 and Parkinson disease: After untouched selection with magnetic beads, flow cytometry analysis based on CD14 and CD16 expression (Fig. 3A,B) revealed no significant differences in the distribution of classical (CD14+CD16−), intermediate (CD14+CD16+), and non-classical (CD14dimCD16+) monocyte subpopulations between PD and controls (Fig. 3C).