1. Cochrane Austria, Department for Evidence-based Medicine and Evaluation; Danube University Krems; Krems Austria
2. Institute for Medical Information Processing, Biometry and Epidemiology; IBE, LMU Munich; Munich Germany
3. Cochrane Hungary, Clinical Center of the University of Pécs, Medical School; University of Pécs; Pécs Hungary
4. Research Group for Evidence-Based Public Health; Leibniz Institute for Prevention Research and Epidemiology; Bremen Germany
5. Department for Health Services Research, Institute for Public Health and Nursing Research, Health Sciences Bremen; University of Bremen; Bremen Germany
6. Great Ormond Street Institute of Child Health; University College London; London UK