1. From the Department of Emergency Medicine Medical University of Vienna ViennaAustria
2. Department of Pulmonology Clinic Penzing Vienna Health Care Group ViennaAustria
3. Division of Angiology Department of Medicine II Medical University of Vienna ViennaAustria
4. Department of Medicine I Clinic Donaustadt Vienna Health Care Group ViennaAustria
5. Department of Laboratory Medicine Medical University of Vienna ViennaAustria
6. Division of Clinical Virology Department of Laboratory MedicineMedical University of Vienna ViennaAustria
7. Centre for Medical Statistics Information Technology and Intelligent Systems Medical University of Vienna Vienna Austria