1. Division of Safety of Medicinal Products and Medical Devices Paul‐Ehrlich‐Institut, Federal Institute for Vaccines and Biomedicines Langen Germany
2. Division of EU Co‐operation/Microbiology Paul‐Ehrlich‐Institut, Federal Institute for Vaccines and Biomedicines Langen Germany
3. Department of Neurology Heinrich‐Heine‐University Düsseldorf Düsseldorf Germany
4. Department of Neurology University Hospital of Cologne Cologne Germany