1. Goethe University; Evidence-Based Medicine Frankfurt, Institute of General Practice; Theodor-Stern-Kai 7 Frankfurt Germany 60590
2. Hochschule RheinMain University of Applied Science; Wiesbaden Business School; Bleichstr. 44 Wiesbaden Germany
3. Medical University of Graz; Department of Anesthesiology and Intensive Care Medicine; Auenbruggerplatz 29 Graz Austria 8036
4. Protestant Hospital Oldenburg, European Medical School Oldenburg-Groningen; Department of Anaesthesiology and Intensive Care Medicine; Steinweg 13-17 Oldenburg Germany D-26122
5. Evangelisches Krankenhaus Oldenburg - European Medical School; Oldenburg Germany
6. Graz, Austria / Institute of General Practice, Goethe University; Institute of General Practice and Evidence-Based Health Services Research, Medical University of Graz; Frankfurt am Main Germany
7. J.W. Goethe-University Hospital; Department of Dermatology, Venereology, and Allergology; Theodor-Stern-Kai 7 Frankfurt Germany 60590