1. Medical University of Graz; Department of Internal Medicine; Auenbruggerplatz 15 Graz Austria 8036
2. Medical University of Graz; Institute for Medical Informatics, Statistics and Documentation; Engelgasse 13 Graz Austria 8010
3. Institute for Quality and Efficiency in Health Care; Dillenburger Str. 27 Cologne Germany 51105
4. Medical University Graz; Department of Internal Medicine; Auenbruggerplatz 15 Graz Austria 8036
5. IQWiG; Koln Germany
6. Medical University of Graz; Department of Internal Medicine and Institute for Medical Informatics, Statistics and Documentation; Auenbruggerplatz 15 Graz Austria 8036