Interestingly, all significant positive associations with HPgV titer in PD-LRRK2 patients were from the SNORA class: SNORA8, SNORA24, SNORA2A, SNORA10, SNORA71D, SNORA31, SNORA71B, SNORA26, SNORA43, SNORA34, SNORA16A, SNORA54, SNORA70, SNORA68, SNORD15A, SNORA21, SNORA80B, SNORA80A, SNORA7A, SNORA17, SNORA48, SNORA9, SNORA62, SNORA76A, and SNORA7B. This evidence concerns the gene SNORD15A and Parkinson disease.