1 Cochrane Germany, Cochrane Germany Foundation, Freiburg, Germany; Institute for Evidence in Medicine, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany.
2 Cochrane Germany, Cochrane Germany Foundation, Freiburg, Germany; Institute for Evidence in Medicine, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany. Electronic address: [email protected].