IL6 and glioblastoma: An updated PubMed® search (7.22.2024) revealed again only two papers using the index words of “glioblastoma” and “vagus nerve stimulation” [Chrastina et al., 2015; Kumaria and Ashkan, 2023] and none using pro-inflammatory cytokines (e.g., IL-6) as a target (Fig. 4B), and none using VNS in combination with cytokine reduction and/or ICI.