SLC2A1 and Dravet syndrome: Patients with GLUT1-DS were diagnosed at an older age (median= 8.5 years; IQR = 5.0–10.0 years) than those with DRE (median = 4.0 years; IQR = 1.0–7.5 years; p = 0.041) and began dietary treatment earlier after diagnosis (median interval = 0.0 years; IQR = 0.0–1.0 years versus median = 4.7 years; IQR = 3.5–6.5 years, respectively, p < 0.001)—an expected finding being KD the only available treatment for GLUT1-DS.