1. Peri-operative Transfusion Medicine; School of Medicine; University of Málaga; Málaga Spain
2. Department of Colorectal Surgery; Nottingham Digestive Diseases Centre; National Institute for Health Research Biomedical Research Unit; Nottingham University Hospitals; Nottingham UK
3. School of Medicine; Georgetown University; Washington District of Columbia USA
4. Department of Haematology; Cambridge University Hospitals NHS Foundation Trust; Cambridge UK
5. Clinic of Anaesthesiology, Surgical Intensive Care Medicine and Pain Management; Krankenhaus Nordwest; Frankfurt Germany
6. Section of Surgical Pathophysiology; Rigshospitalet Copenhagen University Hospital; Copenhagen Denmark
7. Italian National Blood Centre; National Institute of Health; Rome Italy
8. Département Anesthésie Réanimation; CHU Angers; LUNAM Université d'Angers; Angers France
9. Department of Anaesthesiology, Intensive Care Medicine and Pain Therapy; University Hospital Frankfurt; Frankfurt Germany
10. Department of Anaesthesia; The Royal Marsden NHS Foundation Trust; London UK
11. Division of Surgery and Interventional Science; University College London; London UK
12. Anaesthesiology, Critical Care and Hyperbaric Medicine; Englewood Hospital and Medical Centre TeamHealth Research Institute; Englewood New Jersey USA
13. Department of Transfusion Medicine; Sanquin Blood Bank Amsterdam; and Department of Internal Medicine; Groene Hart Hospital; Gouda The Netherlands
14. Institute of Anaesthesiology, Intensive Care Medicine and Operating Room Management; University Hospital of Zurich; Zurich Switzerland
15. Department of Anaesthesia and Intensive Care; Papworth Hospital; Cambridge UK