1. Department of Physiotherapy, Pain and Exercise Research Luebeck (P.E.R.L.), Institute of Health Sciences, University of Luebeck, Lübeck, Germany
2. Laboratory of Pain Research, Institute of Physiotherapy and Health Sciences, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
3. Center of Brain, Behavior and Metabolism (CBBM), University of Luebeck, Lübeck, Germany