1. RheinMain University of Applied Science; Wiesbaden Business School; Bleichstr. 44 Wiesbaden Germany 65183
2. Evangelisches Krankenhaus Oldenburg - European Medical School; Department of Anesthesiology, Intensive Care Medicine and Pain Therapy; Steinweg 13-17 Oldenburg Germany D-26122
3. Johann Wolfgang Goethe-University Hospital; Department of Dermatology, Venereology and Allergology; Theodor-Stern-Kai 7 Frankfurt am Main Germany 60590
4. Goethe University; Evidence-Based Medicine Frankfurt, Institute for General Practice; Theodor Stern Kai 7 Frankfurt Germany 60590