1. Institute of Anesthesiology, University Hospital Zürich, Zürich, Switzerland. donat.spahn@usz.ch.
2. Institute of Surgical Pathology, Department of Pathology, University Hospital Zurich, Zurich, Switzerland.
3. Medical Society for Blood Management, Laxenburg, Austria.
4. Department of Haematology, University of Sydney, Royal North Shore Hospital of Sydney, St. Leonards, New South Wales, Australia.