1. Krankenanstalt Rudolfstiftung; Vienna Austria
2. Department of Neurology; Medical University Innsbruck; Innsbruck Austria
3. Department of Neurology; Medical University Graz; Graz Austria
4. Neurological Department; KH Barmherzige Brüder; Linz Austria
5. Neurological Department; Kaiser-Franz Josef Spital; Vienna Austria