1. Joint Department of Medical Imaging, Princess Margaret Cancer Centre, University Health Network, Mount Sinai Hospital and Women's College Hospital, University of Toronto, 610 University Ave, Ste 3-960, Toronto, ON M5G 2M9, Canada
2. Department of Radiology, Sheba Medical Center, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
3. Division of Thoracic Surgery, Toronto General Hospital, University of Toronto, Toronto, ON, Canada