1. Department of Neurology, Kliniken Maria Hilf Mönchengladbach, Faculty of Health; University of Witten/Herdecke; Viersenerstrasse 450 D-41063 Mönchengladbach Germany
2. Department of Nuclear Medicine, HELIOS-Klinikum Wuppertal; University of Witten/Herdecke; Witten Germany
3. Institute of Neuropathology, Medical Faculty, RWTH Aachen University; Aachen Germany
4. Autonomic Laboratory, Department of Neurology and Clinical Neurophysiology, HELIOS-Klinikum Wuppertal; University of Witten/Herdecke; Witten Germany