MGMT and brain neoplasm: We thank Dr. Thierry Muanza and Dr. Slawomir Kumala (Translational Radiation Oncology Laboratory, McGill University) for providing U87/EV and U87/MGMT cell lines and Dr. Jad Ashami for having performed their stable transfection at the Brain Tumor Research Centre of Dr. Rolando Del Maestro, Montreal Neurological Institute and Hospital, McGill University.