1. Division of Cardiovascular Surgery of Pronto Socorro Cardiológico de Pernambuco, PROCAPEUniversity of Pernambuco Recife Pernambuco Brazil
2. Department of Cardiovascular Diseases, Unit of Cardiac SurgeryUniversity Hospitals Leuven Leuven Belgium
3. Department of Cardiac Surgery, S.G. Sukhanov Federal Center of Cardiovascular SurgeryE.A. Vagner Perm State Medical University Perm Russia
4. Department of Cardiac SurgeryFederal Center for Cardiovascular Surgery Astrakhan Russia
5. Department of Cardiovascular SurgeryAstrakhan State Medical University Astrakhan Russia
6. Department of Thoracic and Cardiovascular Surgery, West German Heart and Vascular Center EssenUniversity Hospital of Essen, University Duisburg‐Essen Essen Germany
7. Department of Cardiac Surgery, Institut MontsourisUniversity Pierre et Marie Curie Paris France