1. Department of Neuroophthalmology, Eye Center, Medical Center, Medical Faculty, University of Freiburg, Germany
2. NeuroCure Clinical Research Center, Universitätsmedizin, Universität, Berlin, Germany
3. Department of Neurology, University of California, Irvine, CA, USA
4. Department of Neurology and Neurophysiology, Medical Center, University of Freiburg, Germany