1. Department of Thoracic and Cardiovascular Surgery West German Heart and Vascular Center Essen University Hospital of Essen University Duisburg‐Essen Essen Germany
2. Division of Cardiovascular Surgery of Pronto Socorro Cardiológico de Pernambuco – PROCAPE University of Pernambuco Recife Brazil
3. School of Medicine Faculty of Health University of Witten Herdecke Witten Germany