1. GROW-School for Oncology and Developmental Biology; Department of Radiation Oncology (MAASTRO); Maastricht University Medical Centre Maastricht Netherlands
2. University Hospital of Liège, Belgium; Radiotherapy; Domaine Universitaire du Sart Tilman, Batiment B 35 Liege Belgium 4000
3. University Hospital Gasthuisberg, Belgium; Respiratory Oncology Unit; Herestraat 49 Leuven Belgium 3000