1. German Cochrane Centre; Medical Center - University of Freiburg; Freiburg Germany
2. Department of Neurology; Medical Center - University of Freiburg; Freiburg Germany
3. Division of General Practice; Department of Health Services Research; Carl von Ossietzky University Oldenburg; Oldenburg Germany
4. UroEvidence@Deutsche Gesellschaft für Urologie; Berlin Germany
5. Institute of Medical Biometry and Statistics; Medical Center - University of Freiburg; Freiburg Germany