UCHL1 and Parkinson disease: For PD the genes analyzed were GBA (Glucosylceramidase Beta), LRRK2 (Leucine Rich Repeat Kinase 2), PARK2 (Parkin RBR E3 Ubiquitin Protein Ligase), PARK7 (Parkinsonism Associated Deglycase), PINK1 (PTEN Induced Kinase 1), SNCA (Synuclein Alpha), and UCHL1 (Ubiquitin C-Terminal Hydrolase L1).