1 Department of Clinical Neurosciences, Foothills Medical Centre, University of Calgary, 1403 29th St. NW, T2N2T9, Calgary, AB, Canada. mgoyal@ucalgary.ca.
2 Department of Radiology, University of Calgary, Calgary, Canada. mgoyal@ucalgary.ca.
3 Department of Clinical Neurosciences and the Hotchkiss Brain Institute, University of Calgary, Calgary, Canada.
4 Department of Clinical Neurosciences, Foothills Medical Centre, University of Calgary, 1403 29th St. NW, T2N2T9, Calgary, AB, Canada.
5 Department of Medical Imaging, St. Anne's University Hospital Brno and Faculty of Medicine, Masaryk University, Brno, Czech Republic.
6 International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic.
7 Department of Radiology, University Hospital of Basel, Basel, Switzerland.
8 Department of Neuroradiology, Bicêtre Medical Center, Paris, France.
9 Department of Neuroradiology, CHU Montpellier, Montpellier, France.
10 Department of Neurosurgery, Kobe City Medical Center General Hospital, Kobe, Japan.