1. Department of Oto-Rhino-Laryngology and Head & Neck Surgery; Radboud University Nijmegen Medical Centre; Nijmegen; the Netherlands
2. Department of Cardio-Thoracic Surgery; Radboud University Nijmegen Medical Centre; Nijmegen; the Netherlands
3. Department of Pulmonary Diseases; Radboud University Nijmegen Medical Centre; Nijmegen; the Netherlands