1. Pediatric Palliative Care Service, Dr. von Haunersches Kinderspital, Ludwig-Maximilians-University, Munich, Germany.
2. Interdisciplinary Center for Palliative Care, Ludwig-Maximilians University, Munich, Germany.
3. Service de Soins Palliatifs, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Lausanne, Switzerland.