1. Neurology Department, Centro Hospitalar Universitário do PortoHospital de Santo António Largo Prof Abel Salazar, 4099‐001 Porto Portugal
2. Unit for Multidisciplinary Research in BiomedicineInstituto de Ciências Biomédicas Abel Salazar–Universidade do Porto Porto Portugal
3. Immunogenetics LaboratoryInstituto de Ciências Biomédicas Abel Salazar–Universidade do Porto Porto Portugal
4. Instituto Nacional de Saúde Dr. Ricardo Jorge Porto Portugal
5. Nuffield Department of Clinical NeurosciencesOxford University Hospitals and University of Oxford Oxford UK