[1
]
Department of Neurology, University Hospital Essen, University of Duisburg-Essen,
Germany (D.M.H.).
[2
]
Department of Neurology, University Medicine Göttingen, University of Göttingen, Germany
(T.R.D.).
[3
]
Institute of Transfusion Medicine, University Hospital Essen, University of Duisburg-Essen,
Germany (B.G.).