The genes included in the KEGG pathway of ‘Parkinson's disease’ (hsa05012) were ATP5E, UQCRB, UQCRC1, and UQCRFS1 in the first cohort, and ATP5B, ATP5O, COX4I1, COX8A, NDUFA4L2, NDUFB11, NDUFB2, NDUFB8, NDUFS5, UBE2L3, UQCR11, and UQCRH in the second cohort. This evidence concerns the gene NDUFB8 and Parkinson disease.