1 Faculty of Medicine, University of Toronto, University Health Network, Toronto Western Hospital, 399 Bathurst Street, 3mc-423, Toronto, Ontario, Canada M5T 2S8.
2 Faculty of Medicine, University of Toronto, University Health Network, Toronto Western Hospital, 399 Bathurst Street, 3mc-423, Toronto, Ontario, Canada M5T 2S8; Department of Vascular and Interventional Radiology, University Health Network, Toronto Western Hospital, 399 Bathurst Street, 3mc-423, Toronto, Ontario, Canada M5T 2S8.
3 Faculty of Medicine, University of Toronto, University Health Network, Toronto Western Hospital, 399 Bathurst Street, 3mc-423, Toronto, Ontario, Canada M5T 2S8; Department of Vascular and Interventional Radiology, University Health Network, Toronto Western Hospital, 399 Bathurst Street, 3mc-423, Toronto, Ontario, Canada M5T 2S8. Electronic address: Martin.Simons@uhn.ca.