1 Department of Paediatrics, Médecins Sans Frontières (Suisse), Operational Centre Genève, Genève, Switzerland.
2 Division of Critical Care Medicine, Departments of Neurology and Anesthesiology, Perioperative and Pain Medicine, Boston Children's Hospital, Boston, Massachusetts, USA.
3 Departments of Neurology and Anaesthesia, Harvard Medical School, Boston, Massachusetts, USA.