1. Scott-Ritchey Research Center, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA.
2. Department of Anatomy, Physiology and Pharmacology, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA.
3. Department of Clinical Sciences, Auburn College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA.
4. MR R&D, Siemens Healthcare, Malvern, PA 19355, USA.
5. Auburn University MRI Research Center, Auburn University, Auburn, AL 36849, USA.
6. Department of Neurology and Gene Therapy Center, University of Massachusetts Medical School, Worcester, MA 01605, USA.
7. Department of Electrical and Computer Engineering, Auburn University, Auburn, AL 36849, USA.
8. Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA.