1. Centre of Palliative Care and Pediatric Pain; Saarland University; Homburg Germany
2. Department of Neonatology and Pediatric Intensive Care Medicine; University Children's Hospital, Saarland University; Homburg Germany
3. Department of Integrative Pediatric and Adolescent Medicine; Gemeinschaftskrankenhaus Herdecke; Herdecke Germany
4. Faculty of Health; Center for Integrative Medicine, Witten/Herdecke University; Witten Germany
5. Department of Pediatrics; St. Vincenz-Krankenhaus Paderborn; Paderborn Germany
6. University Children's Hospital; Heidelberg Germany