1. Department of Neurology, Christian Doppler Klinik, Paracelsus Medical University, Salzburg, Austria
2. Department of Neurology, Franz Tappeiner Hospital, Merano, Italy
3. Spinal Cord Injury and Tissue Regeneration Center, Paracelsus Medical University, Salzburg, Austria
4. Children's Hospital of Pittsburgh at the University of Pittsburgh Medical Center, Pennsylvania, USA
5. Department of Neurological and Movement Sciences, University of Verona, Italy
6. University of Arkansas for Medical Sciences, Little Rock, USA