All genes except GPX3, ZBTB16, and KCNQ1 have OR of >1 for gastric cancer, whereas all genes have OR of >1 for Parkinson’s disease, suggesting that for a patient who has either Parkinson’s disease or gastric cancer, the status of 12 genes is highly likely to be un-silenced. Here, KCNQ1 is linked to Parkinson disease.