Authors
Klerings I1, Metzendorf M2, Mann M3, Franco J2, Ledinger D1
1Cochrane Austria, Department for Evidence-based Medicine and Evaluation, University for Continuing Education Krems, Krems, Austria
2CMED Group, Institute of General Practice, Centre for Health and Society, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany
3Specialist Unit for Review Evidence, Cardiff University, Cardiff, United Kingdom