1. Department of Pain Medicine, Ruhr-University Bochum, Berufsgenossenschaftliches Universitätsklinikum Bergmannsheil gGmbH Bochum, Bochum, Germany;
2. Department of Anaesthesiology, Intensive Care, Palliative Care and Pain Medicine, Medical Faculty of Ruhr-University Bochum, Berufsgenossenschaftliches Universitätsklinikum Bergmannsheil gGmbH Bochum, Bochum, Germany;
3. Department of Neuropediatrics, Ruhr-University Bochum, University Children’s Hospital, Bochum, Germany;
4. Pain Research, Department of Surgery and Cancer, Imperial College, London, UK;
5. Neurophysiology, Center of Biomedicine and Medical Technology Mannheim CBTM, Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany;
6. Department of Anesthesiology, Intensive Care and Pain Medicine, Hessing Foundation, Augsburg, Germany