1. Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, NE, USA
2. Sagis Dermatopathology, Houston, TX, USA
3. Nebraska Hematology Oncology, Lincoln, NE, USA
4. Dermatology Associates of Lincoln, Lincoln, NE, USA
5. Department of Neurology, University of Texas Southwestern Medical Center, Dallas, TX; VA North Texas Health Care System, Dallas VA Medical Center, Dallas, TX, USA