[1] Univ Med Berlin, Charite, Klin & Hsch Ambulanz Neurol, CSB, D-12200 Berlin, Germany
[2] Univ Med Berlin, Charite, Klin Neurophysiol, CSB, D-12200 Berlin, Germany
[3] Univ Munster, Inst Epidemiol & Sozialmed, D-4400 Munster, Germany
[4] Univ Regensburg, Klin & Poliklin Neurol, D-8400 Regensburg, Germany
[5] Univ Med Berlin, Charite, Klin & Poliklin Neurol, D-12200 Berlin, Germany
[6] Stadt Klinikum Karlsruhe gGmbH, Neurol Klin, Karlsruhe, Germany
[7] Univ Klinikum Erlangen, Neurozentrum, Erlangen, Germany
[8] Univ Giessen, Neurol Klin, D-35390 Giessen, Germany
[9] Heidelberg Univ, Inst Physiol & Pathophysiol, D-6900 Heidelberg, Germany
[10] Heidelberg Univ, Neurol Klin, D-6900 Heidelberg, Germany
[11] Klinikum Minden, Neurol Klin, Minden, Germany
[12] Stadt Klinikum Munchen GmbH, Klinikum Harlaching, Neurol Klin, Munich, Germany
[13] Univ Jena, Hans Berger Klin Neurol, D-6900 Jena, Germany
[14] Rhon Klinikum Bad Neustadt, Neurol Klin, Bad Neustadt an der Saale, Germany
[15] Humboldt Univ, Charite, D-1086 Berlin, Germany
[16] Univ Leipzig, MPI, Leipzig, Germany