From the Department of Pulmonary Diseases Vrije Universiteit Medical Centre; Department of Medical Oncology, Netherlands Cancer Institute; Nederlandse Vereniging Artsen voor Longziekten en Tuberculose Data Centre, Amsterdam; Jeroen Bosch Hospital, 's-Hertogenbosch; Rijnstate Hospital, Arnhem; Nij Smellinghe, Drachten; Academisch Ziekenhuis Maastricht, Maastricht; University Medical Centre Groningen, Groningen, the Netherlands; Department of Oncology and Hematology, Cantonal Hospital, St Gallen,... (At 2009-04-20)