1. Department of Cardiothoracic Surgery University Medical Center Groningen University of Groningen Groningen the Netherlands
2. Department of Respiratory Medicine University Medical Center Utrecht Utrecht the Netherlands
3. Department of Respiratory Medicine Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
4. Department of Pulmonary Medicine and Tuberculosis University Medical Center Groningen University of Groningen Groningen the Netherlands
5. Department of Cardiothoracic Surgery Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
6. Department of Cardiothoracic Surgery University Medical Center Utrecht Utrecht the Netherlands