Sankar Bandyopadhyay1, Matthew Wicklund1, Charles S Specht2. 1. Departments of Neurology, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA. 2. Departments of Pathology, Ophthalmology, Neurosurgery and Neurology, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA.