1. Institute of Health Sciences, Department of Physiotherapy, Pain and Exercise Research Luebeck (P.E.R.L.), Universität zu Lübeck, 23562 Lübeck, Germany
2. Center of Brain, Behavior and Metabolism (CBBM), University of Luebeck, 23562 Lübeck, Germany
3. Institute of Medical Informatics, University of Lübeck, 23562 Lübeck, Germany
4. Laboratory of Pain Research, Institute of Physiotherapy and Health Sciences, The Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland
5. Division of Behavioral Medicine and Clinical Psychology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH 45229-3026, USA
6. Department of Knowledge Engineering, University of Economics in Katowice, 40-287 Katowice, Poland