Our results identified seven proteins, out of the 25, to be causally associated to PD risk (SDCBP2, GPNMB, CD68, LCT, ENTPD1, ITGB2, and C1QTNF1) (Table 1, Supplementary Table 7, and Supplementary Fig. 5). Here, ITGB2 is linked to Parkinson disease.