1. Department of Surgical Gastroenterology, Endoscopy Unit, Copenhagen University Hospital Herlev, Copenhagen, Denmark
2. Department of Pulmonary Medicine, Gentofte University Hospital, Hellerup, Denmark
3. Department of Thoracic Surgery, Rigshospitalet, Copenhagen Hospital Union, Copenhagen, Denmark
4. Department of Thoracic Surgery, University Hospitals Leuven, Belgium
5. Gedyt Endoscopy Center, Buenos Aires, Argentina
6. Department of Pneumology and Critical Care Medicine, Thoraxklinik, University of Heidelberg, Heidelberg, Germany
7. Digestive Endoscopy Unit, Catholic University, Rome, Italy
8. Department of Gastroenterology, University Hospital Ramón y Cajal, Universidad de Alcala, Madrid, Spain
9. Department of Respiratory Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
10. Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
11. Centre for Clinical Education, University of Copenhagen and the Capital Region of Denmark, Copenhagen, Denmark