1. Department of Neurology, University Medical Center, Johannes-Gutenberg-University , Mainz , Germany
2. Department of Orthopaedics and Traumatology, University Medical Center, Johannes-Gutenberg-University , Mainz , Germany
3. Institute of Physical Therapy, Prevention and Rehabilitation, University Medical Center, Johannes-Gutenberg-University , Mainz , Germany
4. DRK Schmerz-Zentrum, Auf der Steig 14-16 , Mainz , 55131 , Germany