1 Department of Thoracic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
2 Department of Cardiothoracic Surgery, Université Catholique de Louvain (UCL), Brussels, Belgium.
3 Department of Thoracic and Vascular Surgery, Antwerp University Hospital and Antwerp University, Antwerp, Belgium. Electronic address: paul.van.schil@uza.be.