1 Department of Cardiothoracic Surgery, Radboud University Medical Centre, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands. ikram.achbar@radboudumc.nl.
2 Department of Cardiothoracic Surgery, Radboud University Medical Centre, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands.
3 Department of Pulmonary Diseases, Radboud University Medical Centre, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands.