1. Unit of Cardiac Surgery, Department of Cardiovascular Diseases University Hospitals Leuven Leuven Belgium
2. Faculty of Medicine, School of Medicine Imperial College London London UK
3. Department of Cardiothoracic Surgery, Imperial College Healthcare NHS Trust Hammersmith Hospital London UK
4. Faculty of Medicine E.A. Vagner Perm State Medical University Perm Russia
5. Department of Cardiovascular Surgery Pronto Socorro Cardiológico de Pernambuco (PROCAPE) Recife Pernambuco Brazil
6. Department of Cardiothoracic Surgery, Heart Center Essen Huttrop University Hospital Essen Essen Germany
7. Department of Thoracic and Cardiovascular Surgery, West German Heart and Vascular Center Essen, University Hospital of Essen University Duiburg‐Essen Essen Germany
8. Department of Cardiovascular Surgery S.G. Sukhanov Federal Centre of Cardiovascular Surgery Perm Russia