Affiliation: | 1.Department of Thoracic and Cardiovascular Surgery,University of G?ttingen,G?ttingen,Germany;2.Division of Cardiac Surgery, Brigham and Women's Hospital,Harvard Medical School,Boston,USA;3.Department of Anesthesiology and Intensive Care Medicine,University of G?ttingen,G?ttingen,Germany;4.Department of Radiology,University of G?ttingen,G?ttingen,Germany |