1. Thoracic Oncology; Ghent University Hospital; Gent Belgium
2. Department of Respiratory Medicine; ZNA Middelheim; Antwerpen Belgium
3. Department of Respiratory Medicine; Centre Hospitalier Régional de la Citadelle; Liège Belgium
4. Roche; Brussel Belgium
5. Center for Health Outcomes and Pharmacoeconomic Research; College of Pharmacy; University of Arizona; Tucson AZ USA