1. Department of Anaesthesiology, Intensive Care, Emergency and Pain Medicine; University Hospital Würzburg; Würzburg Germany
2. Cochrane Metabolic and Endocrine Disorders Group; Institute of General Practice, Medical Faculty of the Heinrich-Heine University Düsseldorf; Düsseldorf Germany
3. Department of Clinical Sciences; Liverpool School of Tropical Medicine; Liverpool UK
4. Department of General Practice; University Hospital Würzburg; Würzburg Germany
5. Cochrane Haematology, Department of Internal Medicine, Faculty of Medicine and University Hospital Cologne; Center for Integrated Oncology, University of Cologne; Cologne Germany