A Wurtz1,2, I Hysi1, E Kipnis3, M C Copin4. 1. IMPRT-IFR 114, EA 4489, Lille University Medical School, UDSL-Université Lille Nord de France, Lille, France. 2. Cardiac and Thoracic Surgery Division, Lille University Teaching Hospital, CHULille, Lille, France. 3. Surgical Critical Care Unit-Department of Anesthesiology and Critical Care, Lille University Teaching Hospital, CHULille, Lille, France. 4. Institute of Pathology, Lille University Teaching Hospital, CHULille, Lille, France.