1. Department of Neurology St. Luke's University Health Network Bethlehem PA USA
2. Department of Neurology Vanderbilt University Medical Center Nashville TN USA
3. Department of Neurology University of Rochester Medical Center Rochester NY USA
4. Department of Neurology Medical College of Wisconsin Milwaukee WI USA
5. Department of Neurology Upstate Medical University Syracuse NY USA
6. Department of Neurology University of Pittsburgh Medical Center Pittsburgh PA USA