USP15 and Parkinson disease: In addition, there is evidence of association with PD in the meta-analysis for SNPs rs7315790 (p = 3.55×10−2) and rs10784293 (p = 2.26×10−2) in USP15 (ubiquitin specific peptidase 15), rs10450989 (p = 3.97×10−2) in USP3 (ubiquitin specific peptidase 3), and rs878396 (p = 1.04×10−2), rs4149589 (p = 1.96×10−2), and rs2043265 (p = 2.49×10−2) in NEDD4L (neural precursor cell expressed, developmentally down-regulated 4-like), further supporting the possible involvement of these pathways in PD etiology.