1. Department of Anesthesiology and Intensive Care Medicine, Pain Clinic, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
2. Klinikum Region Hannover, Nordstadt Krankenhaus, Department of Anaesthesiology, Intensive Care Medicine, Intensive Care Medicine, Pain Medicine, Haltenhoff str. 41, 30167 Hannover, Germany
3. Klinik für Kinderchirurgie und Kinderneurologie, Klinikum Bremen Mitte, St.-Jürgen-Str. 1, 28177 Bremen, Germany
4. Department of Neurology and Neurophysiology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
5. Department of Psychosomatics and Psychotherapy, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
6. Laboratory for Molecular Neuroscience, Department of Psychiatry, Social Psychiatry and Psychotherapy, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
7. Center of Pain Medicine Hannover, Aegidientorplatz, 30159 Hannover, Germany