1 From the Department of Medical Imaging, London Health Sciences Centre, 800 Commissioners Rd E, London, ON, Canada N6A 5A5 (D.L., M.B., P.S., J.C.); Department of Medical Imaging, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada (K.G., J.C.); and Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montréal, Quebec, Canada (S.B.).