1 Department of Neurology, Erasmus Medical Center, Rotterdam, the Netherlands. Electronic address: r.neuteboom@erasmusmc.nl.
2 Department of Paediatric Neurology, Assistance Publique-Hôpitaux de Paris, University Hospitals Paris-Saclay, Bicêtre Hospital, French Reference Network of Rare Inflammatory Brain and Spinal Diseases, Le Kremlin Bicêtre, France and European Reference Network-RITA, France.
3 Department of Pediatric Neurology, Children's Hospital Datteln, Witten/Herdecke University, Datteln, Germany.