1 Division of Neuroradiology, Department of Medical Imaging, University of Toronto, Sunnybrook Health Sciences Centre, AG270C-2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada. Electronic address: pejman.maralani@sunnybrook.ca.
2 Division of Neuroradiology, Department of Medical Imaging, University of Toronto, Sunnybrook Health Sciences Centre, MG167-2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada. Electronic address: sean.symons@sunnybrook.ca.