1 Paediatric Mobile Palliative Care Team, Robert Debré, University Hospital, Assistance Publique-Hôpitaux de Paris, University of Paris, Paris, France. Electronic address: armelle.nicolas-robin@aphp.fr.
2 Paris Nanterre University, CEDCACE EA 3457, 92000 Nanterre, France.
3 Paris Nanterre University, CTAD, CREDOF UMR 70/74, 92000 Nanterre, France.