An example of a study that showed such correlation is the one that was performed on 112 epilepsy patients with unknown etiology, and that detected autoimmune antibodies in 39 (34.8%) patients: 15 (13.4%) had TPO antibodies, 14 (12.5%) had GAD65 antibodies, 12 (10.7%) had VGKCc antibodies (4 of whom were positive for LGI1] antibodies), and 4 (3.6%) had NMDA-R antibodies (39). The gene discussed is GAD2; the disease is epilepsy.