TKT and Herpetic encephalitis: BVDU-mediated ablation of hiPSC-NPCs is novel as, outside the treatment of herpetic encephalitis for mouse and human neurons, there have not been any reported uses of HSV-TK+BVDU ablation for human neural cell types, including NPCs (Wigdahl et al., 1983, 1984; Field et al., 1984).