Funding Sources Funding for this study was received from the Gray- son Jockey Club Research Foundation, the Southern California Equine Foundation, the Dolly Green Re- search Foundation, and the Stronach Group.
Declaration of Ethics
The Authors have adhered to the Principles of Vet- erinary Medical Ethics of the AVMA.
Conflict of Interest
Drs. Stepanov and Beylin are employees and share- holders of LONGMILE Veterinary Imaging, division of Brain Biosciences, Inc., a company that designed and manufactured the MILEPET scanner used in this study.