1 Department of Anatomy, Physiology and Pharmacology, College of Medicine, University of Saskatchewan, 107 Wiggins Road, Saskatoon, SK S7N 5E5, Canada.
2 Department of Medical Imaging, College of Medicine, University of Saskatchewan, Saskatoon, SK S7N 0W8, Canada.
3 Department of Medical Imaging, Royal University Hospital (RUH), Saskatoon, SK S7N 0W8, Canada.