Retraction notice to " IP1867B suppresses the Insulin-like Growth Factor 1 Receptor (IGF1R) ablating epidermal growth factor receptor inhibitor resistance in adult high grade gliomas" [Canc. Lett., 458 (2019) pages 29–38]. (1st June 2021) - Mihajluk, K.; Simms, C.; Reay, M.; Madureira, P.A.; Howarth, A.; Murray, P.; Nasser, S.; Duckworth, C.A.; Pritchard, D.M.; Pilkington, G.J.; Hill, R.