1. Department of Oncology-Pathology, Karolinska Institutet, Karolinska University Hospital, Solna, Sweden;
2. Centre for Research and Development, Uppsala University, Gävle, Sweden;
3. National Lung Cancer Registry, Regional Cancer Centre Uppsala Örebro, Uppsala University Hospital, Uppsala, Sweden;
4. Department of Clinical Sciences Lund, Division of Oncology, Lund University, Lund, Sweden