1. Kepler University Hospital, Medical Faculty of the Johannes Kepler University Linz; Department of Cardiology, Med Campus III; Krankenhausstraße 9 Linz Austria 4020
2. Royal Lancaster Infirmary; Lancaster Patient Safety Research Unit; Pointer Court 1, Ashton Road Lancaster UK LA1 4RP
3. Vienna General Hospital, Medical University of Vienna; Department of Emergency Medicine; Währinger Gürtel 18-20 Vienna Austria 1090
4. Vienna General Hospital, Medical University of Vienna; Department of Internal Medicine II, Division of Angiology; Währinger Gürtel 18-20 Vienna Austria 1090
5. University Library of the Medical University of Vienna; Information Retrieval Office; Währinger Gürtel 18-20 Vienna Austria 1090