1. Center for Pediatric Clinical Studies, University Children’s Hospital Tuebingen, Tuebingen, Germany
2. Department of Neonatology, University Children’s Hospital Tuebingen, Tuebingen, Germany
3. Knowledge and Evaluation Research Unit, Mayo Clinic, Rochester, MN, USA
4. Basel Institute for Clinical Epidemiology and Biostatistics, University Hospital Basel, Basel, Switzerland
5. Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, ON, Canada
6. Department of Primary Health Care, University of Oxford, Oxford, UK
7. Centre for Evidence-Based Medicine, University of Oxford, Oxford, UK
8. Ottawa Hospital Research Institute, University of Ottawa, Ottawa, ON, Canada