Association of Previous COVID-19 Infection and Preoperative Haemoglobin with Transfusion Burden and Early Postoperative Outcomes Following Cardiac Surgery with Cardiopulmonary Bypass - Cornelia-Elena Predoi; Daniela Filipescu; Mihai Gabriel Stefan; Radu Filipescu; Dragos Guz; Cornelia Margineanu; Mihai Popescu; Cornel Robu; Serban-Ion Bubenek-Turconi; Niculae Iordache (Journal of Clinical Medicine, 2026)