Interpreting Blood Transfusion in Hip Fracture Surgery: Marker of Severity Rather Than Mediator of Harm? [Letter]

Aisha Ahmad,1 Benjamin HL Harris,2–7 Michael B Fertleman,2 Louis J Koizia2 1Imperial College NHS Trust, London, UK; 2Cutrale Perioperative and Ageing Group, Department of Bioengineering, Imperial College London, London, UK; 3St. Catherine’s College, University of Oxford, Oxford, UK; 4Department of Oncology, University of Oxford, Oxford, UK; 5Institute for Liver and Digestive Health, Division of Medicine, University College London, London, UK; 6Department of Psychosocial Rehabilitation, Medical University of Lodz, Lodz, Poland; 7Collaborating Centre for Values-Based Practice, St Catherine’s College, Oxford, UKCorrespondence: Louis J Koizia, Email [email protected]