1. Department of Neurology UKD and Center for Neurology and Neuropsychiatry LVR Klinikum Medical Faculty Heinrich Heine University Düsseldorf Germany
2. CSL Behring LLC King of Prussia PA USA
3. Ellen and Martin Prosserman Centre for Neuromuscular Diseases Division of Neurology Department of Medicine University Health Network University of Toronto Toronto Canada
4. Institute for Research and Medical Consultations Imam Abdulrahman Bin Faisal University Dammam Saudi Arabia
5. Department of Neurology Cedars‐Sinai Medical Center Los Angeles CA USA
6. Department of Neurology Nagoya University Graduate School of Medicine Nagoya Japan
7. CSL Behring Marburg Germany
8. Department of Neurology Johns Hopkins University School of Medicine Baltimore MD USA
9. Department of Neurology Maastricht University Medical Center Maastricht The Netherlands
10. Department of Neurology St Elizabeth Hospital Willemstad Curacao
11. Department of Neurology Amsterdam University Medical Centres University of Amsterdam Amsterdam The Netherlands
12. Spaarne Gasthuis Haarlem The Netherlands