1. From the Departments of Medical Imaging (O.L., Y.T.S., N.S.P., M.A.A.), Pathology and Laboratory Medicine (K.F.K.), and Thoracic Surgery (M.Q.), Schulich School of Medicine and Dentistry, Western University, 339 Windermere Rd, London, ON, Canada N6A 5A5; and Department of Medical Imaging, Northern Ontario School of Medicine, Sudbury, Ontario, Canada (Y.T.S.).