1 Division of Cardiothoracic Radiology, Department of Medical Imaging, The Ottawa Hospital Research Institute, University of Ottawa, 501 Smyth Road, Ottawa, Ontario, Canada. Electronic address: csouza@toh.ca.
2 Department of Pathology & Laboratory Medicine, The Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada, 501 Smyth Road. Ottawa, Ontario, Canada.
3 Division of Cardiothoracic Radiology, Department of Medical Imaging, The Ottawa Hospital Research Institute, University of Ottawa, 501 Smyth Road, Ottawa, Ontario, Canada.