Glioblastoma studies included E5 (KCNJ10, KCNN3), E21 (KCNAB2), E26 (KCNE2, KCNJ13), E27 (KCNE4, KCNMB2-AS1), E31 (KCNJ10), E50 (KCND3), and E51 (KCNIP1, KCNJ16, KCNN2). This evidence concerns the gene KCNE4 and glioblastoma.