SLC2A3 and attention deficit-hyperactivity disorder: Regarding ADHD, different cell lines were used to generate iPSCs, including urine epithelial cells of 3 adult patients (Sochacki et al., 2016), fibroblasts of 1 patient carrying a duplication of the neuronal glucose transporter-3 (SLC2A3) (Jansch et al., 2018), and keratinocytes as well as peripheral blood mononuclear cells of several teenage patients (Tong et al., 2019; Grossmann et al., 2021).