1. University of Zagreb School of Medicine; Department of Cardiac Surgery; University Hospital Centre Zagreb; Zagreb Croatia
2. Department of Anesthesiology; University Hospital Centre Zagreb; Zagreb Croatia
3. Klinik für Anästhesiologie und Intensivmedizin; Universität Duisburg-Essen; Universitätsklinikum Essen; Essen Germany
4. TEM International GmbH; Munich Germany