Acknowledgements
The authors thank the 10 centres that participated in the inclusion of patients and the collection of data for this study: CH Victor Dupouy (ARGENTEUIL), CH Henri Duffaut (AVIGNON), HCL—Louis Pradel (BRON), Centre Jean Perrin (CLERMONT-FERRAND), CHU Dijon – Hôpital du Bocage (DIJON), APHM—Hôpital Nord (MARSEILLE), CHU de Montpellier – Hôpital Arnaud de Villeneuve (MONTPELLIER), APHP—Hôpital Cochin (PARIS), CHU de Rennes – Hôpital Pontchaillou (RENNES), CHU de Rouen – Hôpital Charles Nicolle (ROUEN). The authors thank the Direction of Clinical Research and Innovation (DRCI) of the Dijon University Hospital, particularly the Clinical Research Unit and the Internal Promotion Unit. The authors also thank Ms. Aline JAZAYERI, phD (Cardiovascular and thoracic surgery unit) for logistic coordination; the Medical Information Department of the Dijon University Hospital for identification of the DRGs. They are grateful to the French Ministry of Health for funding and to all the patients for their participation. The authors thank Suzanne Rankin for editing the English manuscript.