Jess van Kleef will defend the dissertation 'From trial to registry data: Survival and health-related quality of life outcomes in oesophagogastric cancer'. Supervisors are Prof. H.W.M. van Laarhoven and Prof. L.V. van de Poll-Franse. The co-supervisors are Prof. M.A.G. Sprangers and Dr M.G.H. van Oijen.