1. Pediatric Palliative Care Service, Dr. von Haunersches Kinderspital, Ludwig-Maximilians-University, Munich, Germany.
2. Service de Soins Palliatifs, Centre Hospitalier Universitaire Vaudois (CHUV), University of Lausanne, Switzerland.
3. Department of Pediatrics and Pediatric Oncology Center, Klinikum Schwabing und Klinikum rechts der Isar, Technische Universität München, Munich, Germany.