1. German Paediatric Pain Centre, Children’s and Adolescents’ Hospital, Datteln, Germany
2. Department of Children’s Pain Therapy and Paediatric Palliative Care, Faculty of Health, Witten/Herdecke University School of Medicine, Witten, Germany
3. Faculty of Business and Health, University of Applied Sciences Bielefeld, Bielefeld, Germany
4. Paediatric Pain Center Baden-Württemberg, Department of Pediatric Neurology, Olgahospital Stuttgart, Stuttgart, Germany
5. University Children’s Hospital Augsburg, Swabian Children’s Pain Center, Augsburg, Germany
6. Department of Medicine and Health Services Research, BARMER Health Insurance, Wuppertal, Germany
7. Techniker Krankenkasse, Techniker Health Insurance, Hamburg, Germany