1. Anesthesia and Critical Care Department, Donostia University Hospital, Donostia-San Sebastián
2. Patient Blood Management Working Group of the Spanish Society of Anesthesiology and Critical Care (SEDAR)
3. Blood and Tissue Bank, Navarra Health Department, Pamplona, Spain
4. Department of Medicine and Surgery, Perugia University, Perugia, Italy
5. Hematology Department, University Clinic of Navarra, Pamplona, Spain