SLC6A3 and Lewy body dementia: The current diagnostic criteria for DLB list several indicative and supportive biomarkers, including reduced dopamine transporter uptake in basal ganglia by SPECT or PET, abnormal 123 iodine-MIBG myocardial scintigraphy, polysomnographic confirmation of REM sleep without atonia, relative preservation of medial temporal lobe structures on CT or MRI, generalized low uptake on SPECT/PET perfusion/metabolism with reduced occipital activity, and prominent posterior slow-wave activity on EEG, along with recognition of an overrepresentation of GBA mutations in DLB (McKeith et al., 2017).