1. Cardiac Surgery Department, University Hospital of Zurich, University of Zurich, Zurich, Switzerland
2. Postgraduate Program in Health Science: Cardiology and Cardiovascular Science, Faculdade de Medicina da Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
3. Fundación Interhospitalaria para la Investigación Cardiovascular, Madrid, Spain
4. HerzZentrum Hirlsanden Zurich, Zurich, Switzerland