Whole-exome sequencing (WES) association analysis of 231 PD patients found the polymorphisms in the OPRM1 (rs1799971), MAD2L2 (rs2233019), and MAP7 (rs35350783) genes to be linked with time to levodopa-induced dyskinesia onset (König et al., 2021). This evidence concerns the gene OPRM1 and Parkinson disease.