Affiliations

• ¹ 1 Paediatric Palliative Care Centre and German Paediatric Pain Centre, Children's and Adolescents' Hospital, Datteln, Germany.
• ² 2 Department of Children's Pain Therapy and Paediatric Palliative Care, School of Medicine, Faculty of Health, Witten/Herdecke University, Datteln, Germany.
• ³ 3 Children's and Adolescents' Hospital Datteln and Department of Pediatrics, School of Medicine, Faculty of Health, Witten/Herdecke University, Datteln, Germany.
• ⁴ 4 University Hospital Aachen, Division of Pediatric Hematology, Oncology and Stem Cell Transplantation, Department of Pediatrics, RWTH Aachen University, Aachen, Germany.
• ⁵ 5 Department of Pediatrics, Protestant Hospital Bielefeld, Bielefeld, Germany.
• ⁶ 6 Department of Pediatric Oncology, Hematology and Immunology, University Hospital Bonn, Bonn, Germany.
• ⁷ 7 Division of Pediatric Hematology and Oncology, Department of Pediatrics, Hospital Dortmund, Dortmund, Germany.
• ⁸ 8 Department of Pediatric Oncology, Hematology and Clinical Immunology, Medical Faculty, University Hospital Düsseldorf, Düsseldorf, Germany.
• ⁹ 9 Department of Pediatrics, Hospital Lippe-Detmold, Detmold, Germany.
• ¹⁰ 10 Hematology/Oncology, Pediatrics III, University Hospital Essen, Essen, Germany.
• ¹¹ 11 Gemeinschaftskrankenhaus Herdecke and Integrative Pediatrics, School of Medicine, Faculty of Health, Witten/Herdecke University, Herdecke, Germany.
• ¹² 12 Department of Pediatric Hematology/Oncology, Children's Hospital Köln, Köln, Germany.
• ¹³ 13 Department of Paediatric Oncology and Hematology, Policlinic for Children and Adolescents, University Hospital Köln, Köln, Germany.
• ¹⁴ 14 Centre for Pediatrics and Adolescent Medicine, HELIOS Hospital Krefeld, Krefeld, Germany.
• ¹⁵ 15 Department for Children and Adolescents, Johannes Wesling Hospital Minden, Bochum University, Minden, Germany.
• ¹⁶ 16 Department of Paediatric Hematology and Oncology, Policlinic for Children and Adolescents, University Hospital Münster, Münster, Germany.
• ¹⁷ 17 Department of Paediatric Hematology and Oncology, Asklepios Hospital Sankt Augustin GmbH, Sankt Augustin, Germany.
• ¹⁸ 18 Department of Pediatrics, Helios Medical Centre, Witten-Herdecke University, Wuppertal, Germany.
• ¹⁹ 19 Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA.