1. Department of Comparative Medicine, Penn State Hershey Medical Center, Hershey, PA, USA
2. Department of Pathology, Penn State Hershey Medical Center, Hershey, PA, USA
3. Northwest ZooPath, Monroe, WA, USA
4. Department of Neurosurgery, Penn State Hershey Medical Center, Hershey, PA, USA
5. Department of Pathology, Inova Fairfax Hospital, Falls Church, VA, USA