1. Neurology Outpatient Clinic, Amsterdam UMC location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
2. Biologics Laboratory, Sanquin Diagnostic Services, Amsterdam, The Netherlands Department of Immunopathology, Sanquin Research, Amsterdam, The Netherlands
3. Biologics Laboratory, Sanquin Diagnostic Services, Amsterdam, The Netherlands
4. Central Diagnostic Laboratory, Amsterdam UMC location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
5. Biologics Laboratory, Sanquin Diagnostic Services, Amsterdam, The Netherlands Department of Immunopathology, Sanquin Research, Amsterdam, The Netherlands Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands