1. Department of Medicine I; General Hospital; Vienna Austria
2. Karl Landsteiner Institute of Clinical Thrombosis Research; Vienna Austria
3. Center for Medical Statistics, Informatics and Intelligent Systems; Medical University of Vienna; Vienna Austria
4. Department of Medicine I; Krankenhaus der Elisabethinen; Linz Austria
5. Department of Medicine II; General Hospital; Vienna Austria
6. Department of Angiology; Hanuschkrankenhaus; Vienna Austria