1. Clinic of Neurology, Clinical Centre of Serbia, University of Belgrade School of Medicine, Belgrade, Serbia
2. Clinic of Neurology and Psychiatry for Children and Youth, University of Belgrade School of Medicine, Belgrade, Serbia
3. Clinic of Neurology, Clinical Centre of Serbia, Belgrade, Serbia
4. Institute for Human Genetics, University of Belgrade School of Medicine, Belgrade, Serbia
5. Servei de Neurologia-Neuroimmunologia, Centre d’Esclerosi Múltiple de Catalunya (Cemcat), Institut de Receca Vall d’Hebron (VHIR), Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain