1. Department of Internal Medicine V (Hematology and Medical Oncology), Medical University of Innsbruck, A-6020 Innsbruck, Austria
2. Department of Medical Statistics, Informatics and Health Economics, Medical University of Innsbruck, A-6020 Innsbruck, Austria
3. Department of Neurology, Medical University of Innsbruck, A-6020 Innsbruck, Austria